algebra 2

Add(1/12X^4+6/7X^3+3/8X^2+5)+ (-7/12X^4+5/8X^2-5).


"Please help me solve this"

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asked by esther
  1. X^4/12 + 6X^3/7 + 3X^2/8 + 5 7X^4/12
    + 5X^2/8 - 5.

    LCD = 168.

    (14X^4 + 144X^3 + 63X^2 - 98X^4 + 105X^2) / 168,
    Combine like-terms:
    (-84X^4 + 144X^3 + 168X^2) / 168,

    Factor out 12X^2:
    12X^2(-7X^2 + 12X + 14) / 168,
    Divide numerator and denominator by 12 and get:
    X^2(-7X^2 + 12X + 14) / 14.

    posted by Henry

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