multiply the following polynomials?

Question

2. (2a + 5b)(3a – 7b

Answer 1

Using foil, first is 6a^2, outer is -14ab, inner is 15ab, and last is -35b^2, combining like terms, we get 6a^2+ab-35b^2

Answer 2

Look at the equation as this (a+b)(c+d)
Now if you multipy them it would look like a*c+a*d+b*c+c*d
So (2a+5b)(3a-7b) would be
2a*3a+2a*-7b+5b*3a+5b*-7b
so simplified it would be
6a^2+-14ab+15ab+-35b^2
even more simplified its
6a^2+1ab+-35b^2

Answer 3

(2a + 5b)(3a – 7b)

6a² - 14ab + 15ab - 35b²

Combine terms

6a² + ab - 35b²
.