Question

9x2-7x-2=0 solve by quadratic formula
​

Answer 1

answer is 22 I am explain

Answer 2

Answer:

x = $\frac{-2}{9}$ OR 1

Explanation:

To find :

The value of $9x^{2}$-7x - 2=0

Proof:

• Equation: $9x^{2}$-7x - 2=0

1. a= 9
2. b= -7
3. c= -2

By quadratic formula:

P.F.A the answer below for solution by quadratic formula.

The value of x can also be evaluated using middle term splitting in this equation as follows:

= $9x^{2}$-7x - 2=0

⇒ $9x^{2}$ -9x + 2x  - 2=0

⇒ 9x (x -1) + 2 (x - 1)=0

⇒ (9x +2) = 0  OR  (x-1) =0

⇒ x = $\frac{-2}{9}$ OR x = 1

Hence, proved.

Hope you got both the ways.

Thank You.