Solve by factoring.1. x 2 − 2 x − 15 = 02. 2 x 2 + 5 x − 3 = 03. x 2 = 10 x4. x 3 + 2 x 2 − 8 x = 0V: Solving Cubic Equations, V: Factoring cubes.

Question

Solve by factoring.1.       x          2        −  2  x  −  15  =  02.   2      x          2        +  5  x  −  3  =  03.       x    2    =  10  x4.       x    3    +  2      x    2    −  8  x  =  0V: Solving Cubic Equations, V: Factoring cubes.

autosmut6p · Accepted Answer

Step 11)       x    2    −  2  x  −  15  =  0      x    2    −  5  x  +  3  x  −  15  =  0  x  (  x  −  5  )  +  3  (  x  −  5  )  =  0  (  x  +  3  )  (  x  −  5  )  =  0  x  =  3  ,  x  =  5Step 22)   2      x    2    +  5  x  −  3  =  0  2      x    2    +  6  x  −  x  −  3  =  0  2  x  (  x  +  3  )  −  1  (  x  +  3  )  =  0  (  2  x  −  1  )  (  x  +  3  )  =  0  x  =      1    2    ,  x  =  −  33)       x    2    −  10  x  =  0  x  (  x  −  10  )  =  0  x  =  0  ,  x  =  104)       x    3    +  2      x    2    −  8  x  =  0  x  (      x    2    +  2  x  −  8  )  =  0  x  (      x    2    +  4  x  −  2  x  −  8  )  =  0  x  [  x  (  x  +  4  )  −  2  (  x  +  4  )  ]  =  0  (  x  )  (  x  −  2  )  (  x  +  4  )  =  0  x  =  0  ,  x  =  2  ,  x  =  −  4

Solve by factoring. 1) x^2-2x-15=0. 2) 2x^2+5x-3=0. 3) x^2=10x. 4) x^3+2x^2-8x=0.

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