Question

8. (x + 3)(x - 3) = x(4x + 5)​

Answer 1

Step-by-step explanation:

(x + 3)(x - 3) = x(4x + 5)

=> x(x - 3) + 3(x - 3) = 4x² + 5x

=> x² - 3x + 3x - 9 = 4x² + 5x

=> x² - 9 = 4x² + 5x

=> x² - 4x² - 5x - 9 = 0

=> - 3x² - 5x - 9 = 0

=> -(3x² + 5x + 9) = 0

=> 3x² + 5x + 9 = 0

We know,

x = -b ± √b² - 4(ac) / 2a

Using the Quadratic Formula 3x² + 5x+9=0

Substitute the values a = 3, b = 5, and

c = 9 into the quadratic formula and solve for x.

x = -5±√(5²) - 4.3.9 / 2.3

x = -5±√25 - 108 / 6

x = -5±√83 / 6

x = -5 ± 9.11 / 6

Therefore,

Either,

-5 + 9.11 / 6

x = 4.11 / 6

x = 0.685(Approx)[Answer]

And,

-5 - 9.11 / 6

x = -14.11 / 6

x = -2.351(Approx)[Answer]

Hope it helps you.

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Answer 2

Answer:

One solution

Step-by-step explanation: