Question

Помогите решить пожалуйста

Answer 1

$4. : 18x - 6 {x}^{2} = 0 \ 6x(3 - x) = 0 \ x = 0 : x = 3 \ \ 5. \ 4 {x}^{2} - a = {x}^{2} \ a = {4}^{2} - {x}^{2} = 3 {x}^{2} \ b - x = 2x \ b = 2x + x = 3x \ - 7 + c = 1 \ c = 7 + 1 = 8$