Given a + B = 5, ab = 1.5, find the square of a + B (a-b)
Application of complete square formula
A + B = (a + b) - 2Ab = 25-3 = 22
(a-b) square = (a + b) square-4ab = 19
RELATED INFORMATIONS
- 1. Given a + B = 2, ab = 1, find the quadratic power of (1) a + B; (2) the quadratic power of (a-b)
- 2. As shown in the figure, in the triangle ABC, C = 2 b. prove: the square of ab - the square of AC = AC times BC The graph is an obtuse triangle
- 3. We know that the positive number a B C satisfies the power a of 2 is equal to the power B of 3 is equal to the power C of 6
- 4. Finding ab-cb = AC with power 2A = 3, power B = 6, power C (a, B, C are all natural numbers)
- 5. It is known that ABC is a natural number, the power a of 2 is equal to 3, the power B is equal to 6, and the power C is equal to 6
- 6. If we know that 1176 * a = B to the fourth power (AB is a non-zero natural number), then the minimum of a is ()?
- 7. Given A-B = 3, B-C = 5, find the value of AB AC BC, which is the second power of a + the second power of B + the second power of C
- 8. What is the power of 4.2 × 10 to the 7th power △ 3 × 10 to the 5th power
- 9. Given AB = 2, find the value of a 2 − AB + 3B 2 a 2 + AB + 6B 2
- 10. On the simplification of mathematical integral in Grade Seven~~~~ I want 20 simplified calculation problems of integral in seventh grade mathematics, that is to say: the square of a + {A-D + [A-D]} - B, similar problems had better have square or cube, remember! Do not use the problem ~ ~ ~ and have the answer! I really get every point The world is really changing now. It's strange not to save money. Well, I'll just add more next time
- 11. Given that the square of (a + b) is 17 and the square of (a-b) is 8, find the sum of the squares of a + B and ab
- 12. Given that the square of (a + b) is 16 and the square of (a-b) is 4, find the sum of the squares of a and B
- 13. Solve the equation 25X & # 178; + 90x-144 = 0
- 14. x+1.5=1.
- 15. 25X & # 178; - 16y & # 178; factoring, urgent, how to ask, forget~
- 16. X-0.25x = 3
- 17. (25x)²+120²=(65x)²
- 18. Decomposition factor 1.3x & # 178; y-6xy = 2.5x & # 178; Y & # 179; - 25X & # 179; Y & # 178= 1.3x²y-6xy= 2.5x²y³-25x³y²=
- 19. (1) ± √ 169 (2) √ 0.25 (3) - √ 121 / 225 (4) x & # 178; = 1.44 (1) ± √ 169 (2) √ 0.25 (3) - √ 225 / 121 (4) x & # 178; = 1.44 (5) 9x & # 178; = 49 (6) 2 (X-2) 178; - 72 = 0 (7) √ X-2 (8) √ (x-1) 178; (9) √ - X & # 178; (10) √ x + 1 / 3 After answer, will give certain integral
- 20. (X-2) & 178; - 169 / 4 = 0