(x-2)(x+7)= -20
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multiply and equate to zero
x^2 +5x +6 = 0
(x+3)(x+2) = 0
x = -3 and x = -2
x^2 +5x +6 = 0
(x+3)(x+2) = 0
x = -3 and x = -2
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1) Expand the brackets
x² + 7x - 14 -2x = -20
x² + 5x - 14 = -20
2) Make one side = 0
x² + 5x + 6 = 0
3) Factorise. You need two numbers that + together to make 5 and x together to make +6.
Those numbers are 3 and 2
So (x+3)(x+2) = 0
You then need to make x in each bracket = 0
So the answers are: x=-3 and x = -2
x² + 7x - 14 -2x = -20
x² + 5x - 14 = -20
2) Make one side = 0
x² + 5x + 6 = 0
3) Factorise. You need two numbers that + together to make 5 and x together to make +6.
Those numbers are 3 and 2
So (x+3)(x+2) = 0
You then need to make x in each bracket = 0
So the answers are: x=-3 and x = -2
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(x-2)(x+7)= -20
x^2 + 5x - 14 = -20
x^2 + 5x + 6 = 0
(x + 3)(x + 2)
x^2 + 5x - 14 = -20
x^2 + 5x + 6 = 0
(x + 3)(x + 2)