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ashleyb

  • 3 years ago

solve 4x^2=12x+40

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  1. campbell_st
    • 3 years ago
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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.

  2. ashleyb
    • 3 years ago
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    are the answers -5 and 2?

  3. campbell_st
    • 3 years ago
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    nearly... reverse the signs on your answers

  4. sarah43
    • 3 years ago
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    |dw:1343075248668:dw|

  5. ashleyb
    • 3 years ago
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    oh so positive 5 and -2...thankyou for ur help

  6. campbell_st
    • 3 years ago
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    thats it

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