2(3x-4)² = 2(9x²-24x+16) = 18x²-48x+32
-(x+7)² = -(x²+14x+49) = -x²-14x-49
-10(2x-9)(2x+9) = -10((2x)²-9²) = -10(4x²-81) = -40x²+810
7(3x-1)² = 7(9x²-6x+1) = 63x²-42x+7
(2x-7)²+(x+7)(x-7) = 4x²-28x+49+x²-49 = 5x²-28x
-(3x-8)(3x+8) = -((3x)²-8²) = 64-9x²
-2(7-4x)² = -2(49-56x+16x²) = -32x²+112x-98
-4(3+2x)² = -4(9+12x+4x²) = -16x²-48x-36
(2x+3)²+(x-1)² = 4x²+12x+9+x²-2x+1 = 5x²+10x+10
64x²-49 = (8x)²-7² = (8x+7)(8x-7)
(2x+1)(3x+5)+(4x+2)(2x+1) = (2x+1)(3x+5+4x+2) = (2x+1)(7x+7) = 7(2x+1)(x+1)
16x²-40x+25 = (4x)²-2(4x)(5)+5² = (4x+5)²
(x-2)(x+3)+(x-2)(4x-1) = (x-2)(x+3+4x-1) = (x-2)(5x+2)
x²+4x+4 = x²+2(x)(2)+2² = (x+2)²
9x²-24x+16 = (3x)²-2(3x)(4)+4² = (3x-4)²
(x-3)(2x+1)+(2x+1)(3x-2) = (2x+1)(x-3+3x-2) = (2x+1)(4x-5)
x²+14x+49 = x²+2(x)(7)+7² = (x+7)²
(3x+2)(7x-1)-10(7x-1) = (7x-1)(3x+2-10) = (7x-1)(3x-8)
100t² - 121 = (10t)²-11² = (10t+11)(10t-11)
