Search 75,763 tutors
FIND TUTORS
Ask a question
0 0

Multiply (2x+4)^2.

Tutors, please sign in to answer this question.

2 Answers

Hey there.  Since you are squaring it, you multiply it by itself.  Thus it's:

(2x + 4)(2x + 4)

You need to FOIL it.  You know, First, Outside, Inside, Last:

4x2 + 8x + 8x + 16.

Then combine like terms:

4x2 + 16x + 16.

Shake a leg.

Whenever you have something of the form (a + b)^2 you wanna apply the identity:

(a + b)^2 = a^2 + 2*a*b + b^2     thus:

(2x + 4)^2 = 4x^2 + 16x + 16