algebra 2
posted by esther
Add(1/12X^4+6/7X^3+3/8X^2+5)+ (7/12X^4+5/8X^25).
"Please help me solve this"

Henry
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 liketerms:
(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.
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