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March 27, 2017

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Factor by Grouping.Thanks Bob. PLEASE SHOW ME THE STEPS!

1.) 6x2-21xy+8xz-28yz
just to make it clear,the 2 infront of -21
is actualli an Exponent 2.

2.) x2+5x+7x+35

  • Gr. 10 math again! - ,

    Online, x^2 = x squared.

    6x^2 - 21xy + 8xz - 28xz = 6x^2 - 21xy - 20xz =

    x(6x - 21y - 20z)

    x^2 + 5x + 7x +35 = x^2 + 12x + 35

    What two numbers would give a product of 35 and add to 12? That should help you factor.

    I hope this helps. Thanks for asking.

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