A.(-p-3)²? b.(7x - 8y)³? C.(6e²-7f²)²? jwb ya dengan caranya???

Penpangkatan bentuk aljabar
(a +b)² = (a)² + 2(a)(b) + (b)²
(a +b)³  = (a)³ + 3(a)²(b) + 3(a)(b)² + (b)³

a. (-p - 3)²  = (-p)² + 2 (-p)(-3) + (-3)² = p² + 6p + 9

b. (7x - 8y)³ = (7x)³ + 3(7x)² (8y) + 3(7x)(8y)² +(-8y)³
= 343 x³ + 3(49 x²)(8y) + 3(7x)(64 y²) - 512 y³
= 343 x³ + 1.176 x²y  + 1.344 y² - 512 y³

c. (6e² - 7f²)² = (6e²)² + 2(6e²)(-7f²) + (-7 f²)²
= 36e⁴ - 84e²f² + 49f⁴