(x+4)³ = (x+4)(x+4)²
= (x+4)(x²+8x+16)
=x³+8x²+16x+4x²+32x+64
=x³+12x+48+64
u/ soal yg lainnya gimana ya(?) saya kurang mengerti
1. (a-5)⁴ =
2. (2x+y)³ =
gimana ya(?)
Contoh:
1. (a – 5)⁴ = (a – 5)² (a – 5)²
= (a² -10a + 25)(a² – 10a + 25)
= a⁴ – 10a³ + 25a² – 10a³ + 100a² – 250a + 25a² – 250a + 625
= a⁴ – 20a³ + 150a² – 500a + 625
2. (2x + y)³ = (2x + y)(2x + y)²
= (2x + y)(4x² + 4xy + y²)
= 8x³ + 8x²y + 2xy² + 4x²y + 4xy² + y³
= 8x³ + 12x²y + 6xy² + y³