angel12322 angel12322

01-10-2017
Mathematics

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if (2x-3) and (x+5) are multiplied to form the trinomial ax^2 +bx+c, what is the value of b

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texaschic101 texaschic101

01-10-2017

(x + 5)(2x - 3) =
x(2x - 3) + 5(2x - 3) =
2x^2 - 3x + 10x - 15 =
2x^2 + 7x - 15........so b = 7 <==

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Аноним Аноним

01-10-2017

b will be -3 + 2*5 = 7

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just explain how it's not 7 please

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