exam Maths Puzzle Numerical Ability

f(x)=2x^2-x+7; g(x)=x-1 find (f-g)(x)

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exam Other Question

A rectangle is three times as long as it is wide. if its length and width is decreased by 2cm its area is decreased by 36 cm^2. Find its original dimensions. Hi! I need some help solving this equation....

2-|6-8|+5
3(----------) + (sqrt)9+16
4-5*2



Thanks in advance for your help