Question

7
$7x^{2} - 9 \times + 2 = 0$7
$7x ^{2} - 9 \times + 2 = 0$
7x squared - 9 * positive 2 equal 0 ​

Answer 1

Answer:

7x2 = 9 + x

The first step is to arrange all the terms to the left-hand side and equate it to 0.

7x2 - x - 9 = 0

The standard formula to evaluate the quadratic equation ax2 + bx + c = 0 is

x

=

−

b

±

√

b

2

−

4

a

c

2

a

By comparing the given equation to the standard form

a = 7

b = - 1

c = - 9

x

=

−

(

−

1

)

±

√

(

−

1

)

2

−

4

×

7

×

−

9

2

×

7

x

=

1

±

√

253

14