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1 If the expression (x-3)(2x+5) can be expressed as ax^(2)+bx+c, what is ab-c ?

11\newlineIf the expression (x−3)(2x+5) (x-3)(2 x+5) can be expressed as ax2+bx+c a x^{2}+b x+c , what is ab−c a b-c ?

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Evaluate expression when a complex numbers and a variable term is givenright chevron icon

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Q. 11\newlineIf the expression (x−3)(2x+5) (x-3)(2 x+5) can be expressed as ax2+bx+c a x^{2}+b x+c , what is ab−c a b-c ?
  1. Simplify the expression: Now, let's simplify the expression. 2x2+5x−6x−15=2x2−x−152x^2 + 5x - 6x - 15 = 2x^2 - x - 15 So, a=2a = 2, b=−1b = -1, and c=−15c = -15.
  2. Calculate ab−cab-c: Next, we calculate ab−cab-c.ab−c=(2)(−1)−(−15)ab - c = (2)(-1) - (-15)=−2+15= -2 + 15=13= 13

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