anonymous
  • anonymous
Factor completely: 2a^2 - a - 10
Mathematics
  • Stacey Warren - Expert brainly.com
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jamiebookeater
  • jamiebookeater
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anonymous
  • anonymous
(2a-5)(a+2)
.Sam.
  • .Sam.
This is different case :D , for a polynomial of the form ax^(2)+bx+c, find two factors of a*c (-20) that add up to b (-1). In this problem 2*-(5)/(2)=-(10)/(2) (which is (c)/(a)) and 2-(5)/(2)=-(1)/(2) (which is ((b)/(a)) , so insert 2 as the right hand term of one factor and -(5)/(2) as the righthand term of the other factor. (a+2)(a-(5)/(2)) remove the fraction by multiplying the first term of the factor by the denom of the second term (a+2)(2a-5) Get it?

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