find the product ( x² - 2y² ) ( 5x² + 3y² ) amd verify result for
a = 1 and b = -1
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Step-by-step explanation:
2−3y−5y
2
) by (2y−1+3y
2
)
= (2−3y−5y
2
)×(2y−1+3y
2
)
= 2(2y−1+3y
2
)−3y(2y−1+3y
2
)−5y
2
(2y−1+3y
2
)
= 4y−2+6y
2
−6y
2
+3y−9y
3
−10y
3
+5y
2
−15y
4
= −15y
4
—19y
3
+5y
2
+7y−2
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