Умоляю решите 1)(х - 0,7)(0,7 + х) + 5 - х^2 = 2)(5 - 0,9х)(0,9х + 5) - 10 + 0,81х^2 = 3)(х - 0.2)(0,2 + х) + (4 - х)(4 + х) = 4)(0,6 - х)(х +0,6) - (2 - х)(х + 2) =

1)=0.7x+x²-0.49-0.7x+5-x²=4.51
2)=4.5x+25-0.81x²-4.5x-10+0.81x²=15
3)=0.2x+x²-0.04-0.2x+16+4x-4x-x²=15.96
4)=0.6x+0.36-x²-0.6x-2x-4+x²+2x=-3.64