Question

Solve the quadratic equation 9x2 + 7x - 2 = 0.​

Answer 1

Answer:

-1 and 2/9

Step-by-step explanation:

9x^2+7x-2=0

9x^2+9x-2x-2=0

9x(x+1)-2(x+1)=0

(x+1)(9x-2)=0

(x+1)=0 ; (9x-2)=0

X=-1 ; 9x=2

X=2/9

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Answer 2

Answer:

The answer is -1(x)

Step-by-step explanation:

To solve the quadratic equation

Step 1 = Write the factors of the last term of polynomial

That is,

plus minus 1 and plus minus 2

Step 2 = Now,

Let's take x = -1 first to check whether it is a zero of the quadratic equation given in the question

p(x) = 9(x)^2 + 7x - 2 = 0

p(-1) = 9(-1)^2 + 7(-1) - 2 = 0

      =  9 - 7 -2 = 0

      = 9 -9 = 0

Hence proved that -1 is the zero of the quadratic equation given in the question.