exam Maths Puzzle Numerical Ability

please factor the following and explain, thank you
x^2-25 over x+5

and
4y^2+16y+16

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exam Other Question

I have one more question: At 7:00 a.m. the temperature was -15 degrees F. By 1:00 p.m. the temperature increased by 18 degrees F. What was the temperature at 1:00 p.m. Solve:
a) 25(^2x+1)-5=120
b)sqrt2x^2-sqrt2=0
c)2^x=sqrt32
d) -8^0+(-2/5)^-2