exam Maths Puzzle Numerical Ability

f(x)=x^3-5x^2-14x
f(x)=x^3+4x^2+9x+36
f(x)=x^4+x^3-2x^2+4x-24

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exam Other Question

# 7 sketch graph of the function. label coordinates of vertex. lesson 9.4.
y=-x^2+2x-3 What geometric postulate justifies the statement below :

If AB is congruent to CD and CD is congruent to EF, then AB is congruent to EF.