Question 173864
FIND: f + g and f - g

f(x) = 7x^2+5 g(x)= x^2-13

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f + g = f(x) + g(x)

f + g = 7x^2 + 5 + x^2 - 13

f + g = 8x^2 - 8

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f - g = f(x) - g(x)

f - g = 7x^2 + 5 - (x^2 - 13)

f - g = 7x^2 - 5 - x + 13

f - g = 6x^2 + 8

Understand?