7x²y+21 xy² pq+p²q² 1 per 4x² - 1 per 25y² Bantu jawab Ty.

7x²y + 21xy² = 7xy(x + 3y)

pq + p²q² = pq(1 + pq)

1/4x² - 1/25y² = (25y² - 4x²)/(4x²25y²)
= (5y - 2x)(5y + 2x) / (4x²25y²)