27 Multiplied by 4 divided by a 12..Correct me if I'm wrong >.<
For x^2-49
this is a diffarence of two perfect squares. I suggest that this is memorised.
a^2-b^2=(a-b)(a+b)
so x^2-7^2=(x-7)(x+7)
so to solve x^2+x-56 you want to find out what two numbers add to 1 and multiply to make -56
since -56 is negative we know that the two number are difarent signs so that eliminatess answers B and D.
if we try answer C -8+7=-1 so the answer is not C because we want +1 not -1
then we see that 8+(-7)=1 so the answer is A
The answer is 64. You must follow the order of operations, so you do what is in the parenthesis first. 15-7=8 and 5+3=8. Once you calculate that, you do 8×8=64.
Answer:
B 68
Step-by-step explanation:
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