2 answers:
The answer is b Square both sides to get rid of the square root (a+1)^2 = b+1 Subtract 1 from both sides, to isolate b (a+1)^2 - 1 = b now multiply the left side out fully. You should see that the answer is the second choice.
Answer:
b = a² + 2a
Step-by-step explanation:
First, square both sides of the equation.
(a + 1)² = sqrt (b + 1)²
I like to write this part out so I don't make the mistake of writing a² + 1.
(a + 1)(a + 1) = (b + 1)
Distribute and simplify. Remember FOIL: First, Outer, Inner, Last.
a² + a + a + 1 = b + 1
a² + 2a + 1 = b + 1
Subtract 1 from both sides to isolate b.
b = a² + 2a
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Step-by-step explanation:
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