Which of the following is one of the factors of 2x2 + 2x – 144?

a. 2
b. x – 8
c. x + 9
d. All of the above

Question

Which of the following is one of the factors of 2x2 + 2x – 144?

a. 2
b. x – 8
c. x + 9
d. All of the above

shivaniits · Answer

the answer would be b and c  as solving the eq would give
$$2x ^{2}+2x-144$$ 
equivalent to
 2($$x ^{2}+x-72=0$$)
 now we are left with equation 
$$x^{2}+x-72=0$$
that could be written as $$x^{2}+9x-8x-72=0$$
further soving would give $$x(x+9)-8(x+9)=0$$
giving to$$(x+9)(x-8)=0$$
so we have solutions as (x+9) and (x-8)..
hope it helps!!

anonymous · Answer

@shivaniits, 2 HAS to be an answer to because when it would be (2)(x – 8)(x + 9) right?

anonymous · Answer

yeah 2 would be as well

anonymous · Answer

i thought so, thanks.

shivaniits · Answer

but try to fit in the equation $$2x^{2}+2x-144=0$$
will give $$2(2^{2})+2(2)-144$$
does it gives zero i think no!!
atleast solution must satisfy the equation..!!

jim_thompson5910 · Answer

x-8 and x+9 work as well, so it's all of the above

anonymous · Answer

2 is a common factor of the equation, it asks for the factors not the solutions. if it was just solutions, i would agree with you

shivaniits · Answer

so sorry my mistake !!

shivaniits · Answer

hope u got your answer..all are factors!!

anonymous · Answer

don't worry about it. i figured you had misread after all your hard work