Factorise x^2-25
=(x-5)(x+5)
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All answers ▸The point P has coordinates (3, 4) The point Q has coordinates (a, b) A line perpendicular to PQ is given by the equation 3x + 2y = 7 Find an expression for b in terms of a
y=2x+5 and y-x=8. Find x and y.
Factorise fully 12x^2-20x+3
I don't understand how to expand and simplify brackets such as (x-3)(x+5)