A 6 feet tall boy cast a shadow of 9 feet at the same time of day at the shadow of the tree measures 21 feet what is the height
1 answer:
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Answer:
Step-by-step explanation:
(3x^2+x-1)(x^4-2x+1)
=3x^6-6x^3+3x^2+x^5-2x^2+x-x^4+2x-1
=3x^6+x^5-x^4-6x^3+x^2+3x-1
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