Question

Bentuk aljabar 16 ( m + 3n ) pangkat 2 - 9 ( 2m - n ) pangkat 2 =.....

Answer 1

16(m+3n)²-9(2m-n)²
= 16(m²+2.m.3n+(3n)²)-9((2m)²+
2.2m.(-n)+(-n)²)
= 16(m²+6mn+9n²)+9(4m²-4mn+n²)
= 16m²+96mn+144n²+36m²-
36mn+9n²
= 16m²+36m²+14n²+9n²+96mn-36mn
= 52m²+23n²+60mn