Question

(2x + 4)(2x + 8) =

• A. 4$x^2$ +12$x$ +32
• B. 4$x^2$ +24$x$ +32
• C. 4$x^2$ +24$x$ +16
• D. 2$x^2$ +24$x$ +32

Answer 1

The correct option is B

4$x^2$ +24$x$ +32

(2$x$+4)(2$x$ +8)

=2$x$(2$x$ +8) + 4(2$x$ +8)

=4$x^2$ +16$x$ +8$x$ +32

=4$x^2$ +24$x$ +32