exam
Maths Puzzle
Numerical Ability
Why is a quadratic equation called a quadratic? Quad means 4 and nothing in the equation has it.
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exam Other Question
If f(x)=x^2-6x+8, what is the value of f(7)-f(3)?
x^2-4-0 , 3x+x^2=0, x^2-10x+2=0 , 4x^2-16x=-16