(a+4)²+2(a-3)(a-2)= а²+8а+16+2(а²-2а-3а+5)=а²+8а+16+2(а²-5а+5)=а²+8а+16+2а²-10а+10=3а²-2а+26
3а²-2а+26 - МНОГОЧЛЕН.
1) 3х-21+4-7х+1
-4х=16
х=-4
2) 2х-3х+3-4-2х+2
-3х=1
х=-3
если просто упростить, то у меня вышло так:
<span> ( 5m - 2) ( 5m + 2 ) - ( 5m - 4 )^2 + 10m = 25m^2 - 4 - (25m^2 - 40m + 16) <span>+ 10m </span>= 25m^2 - 4 - 25m^2 + 40m - 16 <span>+ 10m </span>= 50m - 20</span>
X + 8x + 96x = 22, 9x + 96x = 22, 105x = 22, x = 105 / 22, x = 4,773.