Question

Uraikan bentuk bentuk aljabar berikut. pakai cara! a (2x+5)3 b.(p+2)3 c.(2p-3)3 d. (x+4)2 + (x-4)2. e (5-y)2 + (5y-1)2

Answer 1

A. (2x + 5) 3
= (2x × 3) + (5 × 3)
= 6x + 15

b. (p + 2) 3
= (p × 3) + (2 × 3)
= 3p + 6

c. (2p - 3) 3
= (2p × 3) - (3 × 3)
= 6p - 9

d. (x + 4) 2 + (x - 4) 2
= (x × 2) + (4 × 2) + (x × 2) - (4 × 2)
= 2x + 8 + 2x - 8
= 2x + 2x + 8 - 8
= 4x

e.(5 - y)2 + (5y - 1)2
= (5 × 2) - (y × 2) + (5y × 2) - (1 × 2)
= 10 - 2y + 10y - 2
= -2y + 10y + 10 - 2
= 8y + 8