How do you multiply #(x + 3)(x + 4)#?

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Answer 1 · 2018-04-29T12:32:14

Use the distributive property.

One way is to set this up as a square matrix

     x       +      3

x # ( x xx x) + (3 xx x)#

+

4 # (4 xx x) + ( 3 xx 4 )#

This gives # x^2 + 3 x + 4x + 12# Adding the like terms gives

# x^2 + 7x + 12#