exam
Maths Puzzle
Numerical Ability
(4 sqrt s + 11 sqrt t)(4 sqrt s - 11 sqrt t)
To me, this is a difference of squares. How is the anser written??
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exam Other Question
3x-2y+4z x=3/4 y=1/5 z=5/4
Factor trinomials.
2x^2+7x-15
(2x )(7x )
How?