(3x+4)²= tolong jawab pakai cara

(3x+4) (3x+4) =
Penyelasain :
(3x+4) (3x+4)=3x(3x+4)+4(3x+4)
=9x²+12x+12x+16
=9x²+24x+16.

(a + b)² = a² + 2ab + b²
••
(3x + 4)²
= (3x)² + 2(3x)(4) + (4)²
= 9x² + 24x + 16