Question

X-1=2
Work out the value of 2x squared

Answer 1

1.22474487139

Explanation:

x = 3

so if 2x^2 - 1 = 2

add 1 to both equations

2x^2 = 3

next, divide 2 from both sides

x^2 = 3/2

x^2 = 1.5

now find the square root of 1.5

the answer is:

1.22474487139

Answer 2

Explanation:

x-1=2 therefore x is 3 so 2x squared is 36