1.

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

Answer»

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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