3 years ago

Who knows the answer plzz help

Mathematics

1 answer:

raketka [301]3 years ago

6 0

Answer:

x = -3 + $\frac{5\sqrt{2} }{2}$ , -3 - $\frac{5\sqrt{2} }{2}$

Step-by-step explanation:

Step 1: Isolate x's

2x² + 12x = 7

Step 2: Factor

2(x² + 6x) = 7

x² + 6x = 7/2

Step 3: Complete the Square

x² + 6x + 9 = 7/2 + 9

(x + 3)² = 25/2

Step 4: Solve for x

√(x + 3)² = √25/2

x + 3 = 5√2/2

x = -3 ± 5√2/2

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