How do you solve a^2+1=2?

2 Answers
Alan P.
Jul 27, 2016

color(green)(a=1) or color(green)(a=-1)

Explanation:

a^2+1 =2

rarr a^2=1 (after subtracting 1 from both sides)

rarr a=+-sqrt(1) = +-1

Jim G.
Jul 27, 2016

a = ± 1

Explanation:

Isolate the a^2 term on the left side of the equation and numeric terms to the right.

rArra^2=2-1rArra^2=1

Take the square root of both sides.

rArrsqrt(a^2)=±sqrt1rArra=±1

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