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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