Square of (a + b) + 6 (a + b) - 16, factorized

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• 1. The width of both the outer lane and the inner lane on the runway is 0.6 meters. In the 200 meter race, compared with the inner lane, how many meters should the starting point of the outer lane go forward?
• 2. The vector a = (x, √ 3Y), B = (1,0), and (a + √ 3b) ⊥ (a - √ 3b) are known (1) Find the equation of LOCUS C of point m (x, y) satisfying the above conditions (2) Let the curve C and the straight line y = KX + m (K ≠ 0) intersect at two different points P, Q, and a (0, - 1). When | AP | = | AQ |, the value range of the real number m is obtained
• 3. Given a (2,5, - 1), B (5,1,11), find the direction cosine and direction angle of AB vector,
• 4. 2B = √ 245 - √ 3 - √ 147 - √ 5 2B = radical (radical 245 - radical 3) - radical (radical 147 - radical 5) Original title: Given a + B = radical (7 radical 5-radical 3), A-B = radical (7 radical 3-radical 5), find: ① AB, ② A & sup2; + B & sup2; And how to make a complete root with the computer Other people don't understand
• 5. It is known that the distance between points a (a, 2) and B (2, a + 1) is equal to the root sign 5, and the value of a is obtained
• 6. Let u = {x x = k, K ∈ Z}, q = x x = 2K, K ∈ Z}, t = {x x = 2K + 1, K ∈ Z} a. The complement of q = t b. Q ∪ t is the proper subset of U c. Q is the proper subset of T d. T is the true son of Q Which of them is right and why not B
• 7. Set a = 1, set B = 2. Do these two sets intersect? So what is the intersection of set C = 1,2, set D = 2,3? Is it 2 or 2 and an empty set?
• 8. `(1) The intersection of sets a and B means___ Union means___ They are expressed as___ ? (2) Let set I be a complete set, and set a be a subset of it___ , expressed in descriptive form as___ ?
• 9. 11. For two given sets a and B, a and B belong to a and B___ The set of elements is called the intersection of a and B
• 10. Two sets explore how to find the intersection of different elements If a = {X / y = - X & sup2; + 2} B = {Y / y = x & sup2; - 1}, then a ∩ B=_______ The set of a and B is______ But the elements of the two sets are different, one is x and the other is y. I remember that the direct intersection is empty
• 11. Please explain the definition of prime number and composite number for me
• 12. Finding prime numbers and composite numbers within 100 Write clearly
• 13. What are the factors of 42? In these numbers () is prime and () is composite
• 14. Is 111121111 prime or composite?
• 15. Is 0 prime or composite Natural numbers are divided into prime numbers, composite numbers, and 1.0 is also a natural number. What is it? Note: "natural numbers are divided into prime numbers, composite numbers, and 1.0 is also a natural number." it's true. And whoever multiplies 0 equals 0
• 16. In 1, 0, 2, 1.9, 7, 15, 26, 78, the odd number has (), the even number has (), the prime number has (), and the combined number has ()
• 17. What are prime numbers, composite numbers, odd numbers and even numbers in 1.2.3.7.18.47.53.78?
• 18. Prime, composite, odd, even judgment questions Natural numbers can be divided into odd and even numbers, prime numbers and composite numbers (judge right or wrong, give reasons)
• 19. What are prime numbers? Prime numbers?
• 20. When are two prime numbers coprime