упростите выражение
1)(5x+2)^2-20x
2)27x^2-3(3x-1)^2
3)(7X-2)^2+28X
4)32y-2(1+8y)^2
1)(5x+2)^2-20x
2)27x^2-3(3x-1)^2
3)(7X-2)^2+28X
4)32y-2(1+8y)^2
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1) (5x+2)²-20x=25x²+20x+4-20x=25x²+42) 27x²-3(3x-1)²=27x²-3(9x²-6x+1)=27x²-27x²+18x-3=18x-3
3) (7x-2)²+28x=49x²-28x+4+28x=49x²+4
4) 32y-2(1+8y)²=32y-2(1+16y+64y²)=32y-2-32y-128y²= -128y²-2