(x + 2Y) (X-Y) is calculated by the complete square formula or the square difference formula

(x + 2Y) (X-Y) is calculated by the complete square formula or the square difference formula

This formula can't be calculated by using the complete square formula or the square difference formula
(x+2y)(x-y)=x²+xy-2y²
If it is
(x+y)(x-y)
Then we can use the square difference formula to calculate:
(x+y)(x-y)=x²-y²
Hope to help you!

(2x + 2Y) 2 - 4 (X-Y) (x + 2Y) complete square formula

2x+2y=(x-y）+(x+2y) a=x-y b=x+2y
Therefore, the original formula = (a + b) ^ 2-4ab = (a-b) ^ 2 = (- 3Y) ^ 2 = 9y ^ 2
"Absolute zero best"
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Using the complete square formula to calculate: (3x + 2Y) (3x-2y) + (- 3x-2y) ^ 2

(3x+2y)(3x-2y)+(-3x-2y)^2
=(3x+2y)(3x-2y)+(3x+2y)^2
=(3x+2y)(3x-2y+3x+2y)
=6x(3x+2y)
=18x^2+12xy

Complete square formula of trinomial

(a+b+c)^2=a^2+b^2+c^2+2ab+2bc+2ca

Use the complete square formula to calculate: 103 square

103 squared
=(100+3)²
=100²+600+9
=10000+600+9
=10609
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Complete square formula (x-2y-3) ^ 2

solution
(x-2y-3)^2
=[(x-2y)-3]^2
=(x-2y)^2-6(x-2y)+9
=x^2-4xy+4y^2-6x+12y+9

(x + 2Y) - (x-2y) (x + 2Y) + (x-2y) (2Y + x), it is better to use the square difference formula or complete square formula (x + 2Y) ^ 2 - (x-2y) (x + 2Y) + (x-2y) (2Y + x), it is better to use the square difference formula or complete square formula

The original formula = x 2 + 4 XY + 4 y 2 + [(x + 2Y) (x + 2Y) - (x + 2Y) (x + 2Y)]
=x²+4xy+4y²

Calculate (x + 3y-z) (- x + 3Y + Z) by square difference formula or complete square formula

（x+3y-z）（-x+3y+z）
=[3y+(x-z)][3y-(x-z)]
=9y²-(x-z)²
=9y²-(x²-2xz+z²)
=9y²-x²-z²+2xz

Using the square difference formula (2x + 1 / 3Y 2) (1 / 3Y? - 2x)

Using the square difference formula:
(2x+1/3y²)(1/3y²-2x)
=(1/3y²)²-(2X)²
=1/9 y^4-4x²

Using the formula of square difference: (2x-3y + 4) (- 2x-3y-4) I'm in a hurry! I will hand in my homework tomorrow, and I will wait on line.!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! ！！！！！！！！！！！！！！！！！！！！！！！！！！！！！！！！！！！！！！！！！！！！！！！！！！！！！！！！！！！！！！！！！！！！！！！！！！！！！！！！！！！！！！！！！！！！！！！！！！！！！！！！！！！！！！！！！！！！ ！！！！！！！！！！！！！！！！！！！

(2x-3y + 4) (- 2x-3y-4) = - (2x + 4-3y) (2x + 4 + 3Y) = - ((2x + 4) square - (3Y) square) = (3Y) square - (2x + 4) square = 9y square - 4x square - 16x-16