exam Maths Puzzle Numerical Ability

a2 – b2 = (a + b) (a – b)

a2 + b2 = (a + b) (?)

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exam Other Question

Please help solve for vertex, axis of symmetry, y-intercept.

(y=2x^3+10+12)
graph the given function
f(x)=-2x-5

please show detailed work so i understand it thank you so much