Simplify the rational expression: x2 +6x-40/x+10 A. X-4 B. X+4 C. -X-4 D. -X+4
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Answer:
Step-by-step explanation:
You can use the Method of substitution.
Substitute the equation into the equation
and then you must solve for the variable x:
Apply Distributive property:
Subtract 12 from both sides of the equation and then add the like terms. Then you get: