anonymous
  • anonymous
can someone completly factor these two equations and tell me how its done step by step for each? 2x^2 + 13x + 15 2x^2 + 27x + 13
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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chestercat
  • chestercat
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saifoo.khan
  • saifoo.khan
http://www.youtube.com/watch?v=X7B_tH4O-_s
Directrix
  • Directrix
What follows is a step-by-step procedure for factoring a trinomial using the "bust the 'b' technique. The expression 4 x² -1x + 18 was factored. If you want to read this and after doing so, would like to see how it works to factor the expression 2x^2 + 13x + 15, then I will help you with it. "Bust the b" Technique 4 x² -1x + 18 a = 4 and c = 18 and b = -1. The task on "bust the b" is to find numbers that mutiply to a*c AND add to b. In this case, numbers that multiply to 4*18 and add to -1. 14 * 18 breaks aparts into the product of prime factors : 2*2*2*3*3 Look at those five factor of 14 * 18 and try to put them in the form of 2 numbers that differ by -1. 2*2*2 and 3*3 appear to differ by 1. That would be 8 and 9. "b" has been "busted into 8 and - 9 whose sum is -1 which equals "b" in this problem. 4x - x+ 18 = 4 x² + 8 x - 9 x - 1. The "b" has been busted. Factoring by grouping comes next. 4 x² + 8 x - 9 x - 18 = 4x ( x + 2) - 9 ( x + 2 ) = --> On this step, (x + 2) is the common factor of the expression. [ (x + 2) ] ( 4x - 9 ) = ( x + 2 ) ( 4x - 9)

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