Answer:
b₂ = - 10
Explanation:
b² - 100 = 0
b² - 10² = 0
(b - 10)(b + 10) = 0
b₁ = 10
a² - b² = (a - b)(a + b)
b^2=100
b=10 or b=-10
7.6m questions
10.1m answers