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

Determine whether the following pairs are invers of eachother

a. f9x0=8x-7 and g(x)=x+8/7

b. f(x)= 1/x and g(x)= 1/x

c. f(x)= 2x+3/x-1 and g(x)=x+3/x-2 what is the answer to

(3x+7)(2x-5)=0