3. A carpenter has a wood that is m2 – 5m – 6 feet long. What is the length of the wood after m2 – 8m – 10 feet have been cut?
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3. A carpenter has a wood that is m2 – 5m – 6 feet long. What is the length of the wood after m2 – 8m – 10 feet have been cut?
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Answer:
3m + 4
Step-by-step explanation:
(m2 – 5m – 6) - (m2 – 8m – 10)
= m2 - m2 - 5m + 8m - 6 + 10
= 3m + 4
As shown above, we used subtraction because the wood has been cut (it became less). Now the minus sign does not only affect the first term of the second equiation but all of them which is why it became -m2 + 8m +10. Now you can solve the equation by eliminating and simplifying it.