Verified answer

4x(x² + 3x - 2)=4x^3+12x^2-8x

(a + 5)(b-7)=ab-7a+5b-35

Объяснение:

№1

4х(х² + 3х - 2) = 4х*х² + 4х*3х - 4х*2 =

4х³ + 12х² - 8х

№2

(а + 5)(b - 7) = a*b - a*7 + 5*b - 5*7 =

ab - 7a + 5b - 35