Factorise h^2 - 36.

Notice that 36 is a square number equivalent to 62 . Can also tell this as the expression contains no coefficients of h so they must cancel each other out. Using this information we can deduce that the factors of the expression must be (h-6)(h+6) as it is the difference of 2 squares.

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Answered by Ella C. Maths tutor

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