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Zina [86]
3 years ago
12

Which of the following is a solution of 4x2 = − 9x − 4?

Mathematics
1 answer:
Arte-miy333 [17]3 years ago
8 0

Step-by-step explanation:

4x2=−9x−4

Step 1: Subtract -9x-4 from both sides.

4x2−(−9x−4)=−9x−4−(−9x−4)

4x2+9x+4=0

For this equation: a=4, b=9, c=4

4x2+9x+4=0

Step 2: Use quadratic formula with a=4, b=9, c=4.

x=

−b±√b2−4ac

2a

x=

−(9)±√(9)2−4(4)(4)

2(4)

x=

−9±√17

8

x=

−9

8

+

1

8

√17 or x=

−9

8

+

−1

8

√17

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Masja [62]

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Sign changes from +4r to -4r

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Move -11 to the other side

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Answer:

(-4,9)

Step-by-step explanation:

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-1

Step-by-step explanation:

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