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10 questions from this quiz
Highest power of xxx is 2
Zero
Factorise the left-hand side
At least one bracket must equal zero
x=−9x = -9x=−9 and x=1x = 1x=1
Difference of two squares
x=0x = 0x=0
Substitute back into original equation
x=[number]x = \text{[number]}x=[number]
(x+a)(x−a)=0(x + a)(x - a) = 0(x+a)(x−a)=0
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