Question

How do I solve this? (4x + 3) (10x - 7)

Answer 1

40x²+2x-21

Explanation:

4x × 10x - 4x × 7 + 3×10x - 3 × 7

40x² - 28x + 30x - 21

40x²+2x-21

Answer 2

40x^2+2x-21

Explanation:

(4x + 3) (10x - 7)

Foil

first 4x*10x = 40x^2

outer 4x*-7 = -28x

inner 3*10x = 30x

last 3 *-7 = -21

Add them together

40x^2 -28x+30x-21

Combine like terms

40x^2+2x-21