ashleyb
solve 4x^2=12x+40
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campbell_st
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rewrite the equation
4x^2 -12 - 40 = 0
take 4 as a common factor
4(x^2 - 3x - 10) = 0
factorise the brackets
4(x - 5)(x + 2) = 0
I'll leave you to finish solving the question.
ashleyb
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are the answers -5 and 2?
campbell_st
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nearly... reverse the signs on your answers
sarah43
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|dw:1343075248668:dw|
ashleyb
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oh so positive 5 and -2...thankyou for ur help
campbell_st
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thats it