Question

(x^2+5y) (x^2-5y)????

Answer 1

Boa noite

(a + b)*(a - b) = a² - b²

a = x²  , a² = x^4
b = 5y , b² = 25y²

(x² + 5y)*(x² - 5y) = x^4 - 25y²

Answer 2

(x² + 5y)(x² - 5y)

x⁴ - 5x²y + 5x²y - 25y²

x⁴ - 25y²