Question 346178
Hi,

{{{4c^2+9-12c}}}
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First put in this form:
{{{4c^2-12c+9}}}
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Check for factoring: *Hint: First Ask Yourself: What numbers added together have a sum of -12 (-6 and -6)
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Then:
What two numbers have a product of 4 and what two numbers have a product of 9 such that the product of these numbers will be -6
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{{{highlight((2c-3)(2c-3))}}}
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Check you answer:

{{{(2c-3)(2c-3)}}} = {{{4c^2-12c+9}}}