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For what value (s) of w, if any, does the expression 5w^(2)+1 equal 81?

User Sali Hoo
by
8.4k points

2 Answers

2 votes

Answer:

4.472

Explanation:

5w^2+1=81

subtract one from each side

5w^2=80

divide 5 on each side

w^2=20

square root each side

w=4.472

User Ultragtx
by
8.1k points
5 votes

Answer:

5w² + 1 = 81

5w² = 80

w² = 16

w = ±4

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