exam Maths Puzzle Numerical Ability

1.3x squared-12x 2.2w squared-8w-10 3.4x squared-25

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exam Other Question

A card is drawn from a standard deck of 52 playing cards. Find the probability that the card is an ace or a black card. Please help me. Simplify:
a) (8^n)(2(^n-2)(4(^n+1)(3^n)/sqrt3^2n
b) (2^x)(8(^x+2)(32(^2x-1)/8^x)(sqrt4^x)