exam Maths Puzzle Numerical Ability

how do you factor the expression 3(x-3)spuared-12?

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exam Other Question

i need help understanding step by step to these problems....they are all odd....

A quadratic function is given.
(a) express the quadratic functino in standard form
(b) find it can you please explain this to me in step by step form so hopefully i can understand this.

log x 9/4 =2

please help me

thank you
julie