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a²-b²
2) a. (a+b) x (a+b) =
a²+ab+ab+b²=
a²+2ab+b²
b. (a-b) x (a-b) =
a²-ab-ab+b² =
a²-2ab+b²
c. (ax+b) x (cx+d) =
acx² + axd + cxb + bd
soal no. b kan (a-b)² kan??
2 a. (a+b)² = (a+b) (a+b) = a² + 2ab + b²
b. (a-b)² = a² - 2ab + b²
c. (ax + b) (cx + d) = acx² + adx + bcx + bd