if a-b=6 and a to the power two +b to the power 2 =42 find ab
Answers
Answered by
3
a - b = 6
Square on both sides,
(a - b)² = 6²
a² + b² - 2ab = 36
42 - 2ab = 36
42 + 36 = 2ab
78 = 2ab
39 = ab
Square on both sides,
(a - b)² = 6²
a² + b² - 2ab = 36
42 - 2ab = 36
42 + 36 = 2ab
78 = 2ab
39 = ab
V777:
thnx
Welcome
Similar questions