Hi,

a)solve 5x^2=10   x = ± sqrt(2)

b)find the x intercepts of f(x)=5x^2-10

f(x)=5x^2-10

f(x)=5(x^2-2) 

x intercepts (when f(x) = 0)

 0 = 5(x^2-2)

 2 = x^2   

x = ± sqrt(2)

y-intercepts are ( sqrt(2), 0) and (-sqrt(2),0)



 

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