Question

выполните возведение в квадрат
1) (4х-3)^2
2) (5m-4n)^2
3) (10c+7d)^2
4) (4x-1/8y)^2
5) (0.3a+0.9b)^2

Answer 1

(4x-3)²=(4x)²-2*4x*3+3²=16x²-24x+9
(5m-4n)²=25m²-40mn+16n²
(10c+7d)²=100c²+140cd+49d²
(4x+1/8y)²=16x²+xy+1/16y²
(0.3a+0.9b)²=0.09a²+0.54ab+0.81b²

Answer 2

спасибо