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VMariaS [17]
3 years ago
10

Solve the following quadratic equation.

Mathematics
1 answer:
Viktor [21]3 years ago
3 0

Answer:

x = -7 and 7

Step-by-step explanation:

4x^2-10=186 add 10 on each side

4x^2 =196 divide by 4  on each side

x^2 = 49 take a √  on each side

x = -7,7

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Complete the square on the following quadratic x2+10x+9=0
kakasveta [241]
Given a quadratic equation x^{2} +ax+c=0

1. the first thing we do when we want to compete the square, is write the coefficient of x as 2 times a number.

In our case the coefficient of x is 10, so we write 10 as 2*5

2. then we write + 5^{2} and - 5^{2} to the expression:

x^{2} +2*5*x+ 5^{2} -5^{2}+9=0

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Answer: (x+5)^{2}-16=0
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Step-by-step explanation:

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