Factorization of X Λ 2 minus 9 plus (x-3) (2x + 1)

Factorization of X Λ 2 minus 9 plus (x-3) (2x + 1)

x^2-9+(x-3)(2x+1)=(x+3)(x-3)+（x-3）（2x+1）
=(x-3)(x+3+2x+1)=(x-3)(3x+4)

The factorization of (XY-1) & sup2; + (x + y-2xy) (x + Y-2) is performed by substitution

So the original formula is = [(B-A-A / 2] / ; + AB = (B \\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\(1);

Factorization 1. (x ^ 2-y ^ 2) (x + y) - (X-Y) ^ 3 2. (a-b) ^ 4 - (B-A) ^ 2 3. X ^ 4-x ^ 2

(X & # 178; - Y & # 178;) (x + y) - (X-Y) & # 179; = (X-Y) (x + y) & # 178; - (X-Y) & # 179; extract the common factor (X-Y) = (X-Y) [(x + y) & # 178; - (X-Y) & # 178;] in brackets, use the square difference formula to decompose = (X-Y) [(x + y) + (X-Y)] [(x + y) - (X-Y)] = (X-Y) × 2x & # 9642; 2Y = 4xy (X-Y) (a -

Factorization: (1) 3ax ^ 2-A ^ 2x + 10ax (2) 13 (x-1) ^ 2-26 (x-1) (3) 12x (X-Y) ^ 2-8 (X-Y) ^ 3 = 4 (X-Y) ^ 2_____

(1)3ax²-a²x+10ax＝ax﹙3x－a＋10﹚;
(2)13(x-1)²-26(x-1)＝13﹙x－1﹚﹙x－1－2﹚＝13﹙x－1﹚﹙x－3﹚;
(3)12x(x-y)²-8(x-y)³=4(x-y)²﹙x＋2y﹚.

One fifth of a is equal to one sixth of B. A is 60. What is B?

60X1/5=BX1/6
12=B/6
B=72

How deep should we dig to build a 150 cubic meter biogas digester with a diameter of 7 meters

7 m × 3.14 = 21.98 M2 × 7 m (height) = 153.86 M & sup3; that is to say, you should dig at least 7 m deep (plus the thickness of frozen soil layer)

Additional questions of mathematics practice paper (11) of Jiangsu Education Press
The first time I did. A minus B, the difference is 1.5; a divided by B, the quotient is also 1.5. What are a and B?

A-B=1.5 B+1.5=A
A÷B=1.5 (B+1.5)÷B=1.5 B=3 A=4.5

Use the five numbers of 1, 2, 3, 7 and 8 to form a formula: (1 + 3) × 7 = 28. Please use the six numbers of 0, 1, 2, 3, 4 and 6
With the five numbers of 1, 2, 3, 7 and 8, we can make a formula: (1 + 3) × 7 = 28
Please use 0, 1, 2, 3, 4 and 6 to make a formula

(6-1)*(2+4)=30

The sales volume in June was 112.5% of that in May. How much higher was the sales volume in June than that in May?

June = 112.5% may
Sales in June increased by 112.5% - 1 = 12.5% over may

How to do question 44 (4) in the fifth grade mathematics exercise book of Beijing Normal University Edition

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