tentukan benruk sederhana dari 5(x2 y+y2 - x ) -5x(xy +2y - 7) pake caranya

= 5 (x²y + y² - x) - 5 x (xy + 2y - 7)
= 5x²y + 5y² - 5x - 5x²y - 10xy + 35x
= (5x²y - 5x²y) + (35x - 5x) - 10 xy + 5y²
= 0 + 30x - 10xy + 5y²
= 30x - 10xy + 5y²