Question

(7x^2-5y)(x^2-3y) by the formula(expansions)class 9 icse​

Answer 1

Answer:

7x⁴ 26x²y + 15y²

Step by-step explanation :

(7x² - 5y) (x² - 3y)

= 7x²(x² - 3y) - 5y(x² - 3y)

= (7x⁴ - 21x²y) - (5yx² - 15y²)

= 7x⁴ - 21x²y - 5x²y + 15y²

= 7x⁴ 26x²y + 15y²

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