140 x-(5x+7)^2. ( √2a-√7b)-при a=11 и b=13

Question

140 x-(5x+7)^2. ( √2a-√7b)-при a=11 и b=13

Answer 1

1)140x-(25x^2-70x+49)

140x-25x^2+70x-49

210x-25x^2-49

-25x^2+210x-49

2)(√2*11 - √7*13)

√22-√91