subtract (3x-7y+5z)-5x(6x-8y+7z) from 7x(5x-3y-4z)
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Step-by-step explanation:
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Answered by
1
Answer:
65x^2 + 19xy - 63xz - 3x + 7y - 5z
Step-by-step explanation:
[ 7x (5x - 3y - 4z)] - [(3x - 7y + 5z) - 5x (6x - 8y + 7z)]
= 35x^2 - 21xy - 28xz - [3x - 7y + 5z - 30x^2 - 40xy + 35xz]
= 35x^2 - 21xy - 28xz - 3x + 7y - 5z + 30x^2 + 40xy - 35xz
= 65x^2 + 19xy - 63xz - 3x + 7y - 5z
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