Question 664233
Lets check the FOIL on
(2x-3)(9x+5)
2x(9x) + 2x(5) - 3(9x) - 3(5)
Combine like terms
18x^2 + 10x - 27x - 15
18x^2 - 17x - 15 - Jacob was correct.
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18x^2 + 17x - 15
Megan was correct that there needs to be mixed signs due to positive 17 and negative 15; however, she made the resulting negative x coefficient larger producing a net negative sign instead of the original positive x coefficient.
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Megan only needs to reverse her signs to (2x+3)(9x-5) to factor correctly.
Check with FOIL
18x^2 - 10x + 27x -15, which combines to 18^2 + 17x - 15
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