1) (x-3)²=x²-6x+9
2) (2x-7)²=4x²-28x+49
3) (6-3x)²=36-36x+9x²
4) (12-x)²=144-24x+x²
5) (6-x)(6+x)=36-x²
6) (7x-3)(7x+3)=49x²-9
7) (2-4x)(2+4x)=4-16x²
8) (3x-3)²=9x²-18x+9
9) (2+7x)³=8+84x+294x²+343x³
10) (3-x)³=27-27x²+9x² -x³
11) (x-5)³=x³-15x²+75x-125
12) (2x+1)³=8x³+12x²+6x+1
13) 6(x-7)²+(x-2)(x+2)=6x²-84x+294+x²-4=7x²-84x+290
14) 7(x-2)³-(6-x)(6+x)= 7x³ -42x² +84x - 56 - 36 + x² = 7x³ -41x² +84x - 92
15) 2(x-4)²-(5-x)=2x² - 16x + 32 - 5 + x = 2x² -15x + 27
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1) (x-3)²=x²-6x+9
2) (2x-7)²=4x²-28x+49
3) (6-3x)²=36-36x+9x²
4) (12-x)²=144-24x+x²
5) (6-x)(6+x)=36-x²
6) (7x-3)(7x+3)=49x²-9
7) (2-4x)(2+4x)=4-16x²
8) (3x-3)²=9x²-18x+9
9) (2+7x)³=8+84x+294x²+343x³
10) (3-x)³=27-27x²+9x² -x³
11) (x-5)³=x³-15x²+75x-125
12) (2x+1)³=8x³+12x²+6x+1
13) 6(x-7)²+(x-2)(x+2)=6x²-84x+294+x²-4=7x²-84x+290
14) 7(x-2)³-(6-x)(6+x)= 7x³ -42x² +84x - 56 - 36 + x² = 7x³ -41x² +84x - 92
15) 2(x-4)²-(5-x)=2x² - 16x + 32 - 5 + x = 2x² -15x + 27