5(2x + y)2 - (2x + y)(x - 7y)
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Given: 5(2x+y)2 - (2x+y)(x-7y)
To find: value of the given equation
Step-by-step explanation:
5(2x+y)2 - (2x+y)(x-7y)
= 10(2x+y) - {2x(x-7y) + y(x-7y)}
= 10×2x + 10×y - { 2x × x - 2x × 7y + y × x - y×7y}
= 20x + 10y - { 2x² - 14xy + xy - 7y²}
= 20x + 10y - {2x² - 13xy - 7y²}
= 20x + 10y - 2x² + 13xy + 7y²
Answer: -2x²+7y²+20x+10y+13xy
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