Question

5 x minus 4 x + 3 x square - 78 x is equal to 1 - 1 x is equal to 3​

Answer 1

Answer:

Step-by-step explanation:

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Answer 2

Here's your answer!

• 5x - 4x + 3x² - 78x = 1 - 1x = 3

• -77x + 3x² - 1 + 1x = 3

• -76x + 3x² - 4 = 0

• 3x² - 76x - 4 = 0

$> x = \frac{ - b ± \sqrt{ { (- b)}^{2} - 4(a)(c)} }{2a}$

$> x = \frac{ - ( - 76) ± \sqrt{ {( - 76)}^{2} - 4(3)( - 4)} }{2(3)}$

$> x = \frac{76 ± \sqrt{5776 + 48} }{6}$

$> x = \frac{76 ± \sqrt{5824} }{6}$

• We will get two equations, one as {-} sign and one as {+} sign.

$> x = \frac{76 + 76.31}{6} ,\: x = \frac{76 - 76.31}{6}$

$> x = \frac{152.31}{6} ,\: x = \frac{ - 0.31}{6}$

• We will reject the negative value.

Hence, x = 25.385.

Hope it helps.