Question

Solve 4r^2 – 5 = 59.

(Points : 1)
{± 3}
{± 4}
{± 5}
{±6}

Answer 1

4r² - 5 = 59
+ 5 + 5
4r² = 64
4 4
r² = 16
r = +4

The answer to the problem is equal to +4

Answer 2

[tex]4r^{2} =64 r^{2} =16 r= \sqrt{16} = ±4