I have already asked this question but I have to use my calculator to solve
x^2 + 8x + 5 = 0
Someone gave me a link to a quadratic formula solver but when I enter it into my calculator I nvever get the right answer.
You can graph it, if you calc is a graphing calc. graph y=x^2+8x+5, where it crosses the x axis, is the solutions.
I know but can you just tell me if this is correct:
a = 1 b = 8 c= 5
x= -8 + square root 8^2 - (4x1x5)
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To solve the quadratic equation x^2 + 8x + 5 = 0, you can use the quadratic formula. The quadratic formula states that for an equation in the form ax^2 + bx + c = 0, the solutions for x are given by:
x = (-b ± √(b^2 - 4ac)) / 2a
In the provided equation, a = 1, b = 8, and c = 5. Plugging these values into the formula, we get:
x = (-8 ± √(8^2 - 4 * 1 * 5)) / (2 * 1)
Simplifying further:
x = (-8 ± √(64 - 20)) / 2
x = (-8 ± √44) / 2
Now, to use your calculator to find the accurate values of x, you need to follow these steps:
1. Enter -8 + √44 into your calculator and press the square root (√) button. This should give you an approximate value for the square root of 44.
2. Divide the result by 2 to get the positive root of the equation.
3. Record the value or store it in your calculator's memory.
4. Repeat steps 1 to 3, but now enter -8 - √44 in step 1 to find the negative root.
By following these steps, you should be able to accurately calculate the roots of the quadratic equation x^2 + 8x + 5 = 0 using your calculator.