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2 years ago

Please help me, 65 points to someone who can help me.

Mathematics

2 answers:

Romashka-Z-Leto [24]2 years ago

7 0

X= -1/2, -11/2 or in decimal form x=-0.5, -5.5

givi [52]2 years ago

3 0

Answer:

x = -0.5 , x = -5.5

Step-by-step explanation:

Solving

-4x² = 24x + 11
4x² + 24x + 11 = 0
4x² + 24x + 36 - 36 + 11 = 0
(2x + 6)² - 25 = 0
(2x + 6)² = 25
⇒ 2x + 6 = ±5

Case 1 : x = +5

2x + 6 = 5
2x = -1
x = -1/2
x = -0.5

Case 2 : x = -5

2x + 6 = -5
2x = -11
x = -11/2
x = -5.5

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