exam
Maths Puzzle
Numerical Ability
Rewrite the expression x^3 - 2x^2 y + x y^2 so that it is easy to calculate the its value without a calculator when x= 21 and y = 19
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exam Other Question
How many positive real solutions are there in:
f(x) = -2x^4 = 3x^3 + 7x^2 + 2
a. 0
b. 2
c. 1
d. None, there is no x-term
What does the graph look like for 3x^2 - 30x +21 ??