Need math help?

Question

How do i simplify these equations?

1.x/12x^2

2. 2x+6/x^2 - 9

3. 3 x square root of 7 + 4 x square root of 7

4. 9 x square root of 2 - 12 x square root of 8

Answer 1

1. x/12x^2 = 1/12x

2. 2x +6 / x^2 - 9 = 2(x + 3) / (x + 3)(x - 3) = 2/ x - 3

3. 7 sq.rt of 7

4. 9 x sq. rt of 2 - 12 x sq. rt of 8 = 9 sq.rt2 - 24sq.rt2 = -15sq.rt2

Answer 2

square root of 8 is two times the square root of two

so you have 9 times the square root of 2- 24 times the square root of 2

that would be minus fifteen tines the square root of 2

Answer 3

calculator.