Complete the trinomial product with mental multiplication. $$( x + 4 ) ( x - 9 ) = x ^ { 2 } - - { - } x - 36$$
A) 6
B) 3
C) 5
D) 8
E) 9

Name: Complete the trinomial product with mental multiplication. \[( x + 4 ) ( x - 9 ) = x ^ { 2 } - - { - } x - 36\] A) 6 B) 3 C) 5 D) 8 E) 9
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Question

Complete the trinomial product with mental multiplication. $$( x + 4 ) ( x - 9 ) = x ^ { 2 } - -  { - } x - 36$$
A) 6
B) 3
C) 5
D) 8
E) 9

Quizplus · Accepted Answer

The correct completion of the trinomial product is $x^2 + 5x - 36$, where the middle term is obtained by adding the products of the outer and inner terms: $4x$ and $-9x$, which sum to $5x$.

Complete the Trinomial Product with Mental Multiplication (x+4)(x−9)=x2−−−x−36( x + 4 ) ( x - 9 ) = x ^ { 2 } - - { - } x - 36(x+4)(x−9)=x2−−−x−36

Complete the Trinomial Product with Mental Multiplication $( x + 4 ) ( x - 9 ) = x ^ { 2 } - - { - } x - 36$