sederhanakan (-2×+y)(5×-3y)

Mapel : Matematika
Kelas : VIII SMP
Bab : Persamaan Kuadrat

Pembahasan :
(-2x + y)(5x - 3y)
= (-2x)(5x) + (-2x)(-3y) + (y)(5x) + (y)(-3y)
= -10x² + 6xy + 5xy - 3y²
= -10x² + 11xy - 3y²