Find the special product using the appropriate formula.
-$$( x + 15 ) ^ { 2 }$$
A) $x ^ { 2 } + 30 x + 225$
B) $x + 225$
C) $225 x ^ { 2 } + 30 x + 225$
D) $x ^ { 2 } + 225$

Question

Quizplus · Accepted Answer

The formula for squaring a binomial is $(a+b)^2 = a^2 + 2ab + b^2$. In this case, $a=x$ and $b=15$, so we have $(x+15)^2=x^2+2(15)x+15^2$. Simplifying gives us $x^2+30x+225$, which is choice A.

Find the Special Product Using the Appropriate Formula (x+15)2( x + 15 ) ^ { 2 }(x+15)2

Find the Special Product Using the Appropriate Formula $( x + 15 ) ^ { 2 }$