exam Maths Puzzle Numerical Ability

Subtract, using the vertical method.

7x2 + 6x from 9x2 - 3

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exam Other Question

i have to solve for x
log2 x + log6 x =3
the 2 and 6 are base numbers This deals with radical exponents;exponential & logarithmic functions.
The problem is to simplify each expression. All variables represent positive real numbers.
4cube root sqrt2