exam Maths Puzzle Numerical Ability

Simplify:
(6x^2 +4x-10)-(4x^2 -6x+4)

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exam Other Question

Use FOIL to multiply
(6x – 1)(3x – 4)
Hi I am working on this problem. The section is on solving square root and other radical equations.
How do you do this?

(16x^8)^-0.75

thank you