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Vinvika [58]
3 years ago
11

How can you use the quadratic formula to complete a square?

Mathematics
2 answers:
Marina86 [1]3 years ago
6 0
It has become somewhat fashionable to have students derive the Quadratic Formula themselves; this is done by completing the square for the generic quadratic equation ax2 + bx + c = 0. While I can understand the impulse (showing students how the Formula was invented, and thereby providing a concrete example of the usefulness of abstract symbolic manipulation), the computations involved are often a bit beyond the average student at this point.
notka56 [123]3 years ago
5 0
<span><span>Step 1 Divide all terms by a (the coefficient of x2).</span>Step 2 Move the number term (c/a) to the right side of the equation.<span>Step 3 Complete the square on the left side of the equation and balance this by adding the same value to the right side of the equation.</span></span>
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3 years ago
I don’t understand how to solve this : <br> -17 + 18 - 12
Llana [10]

Answer:

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Given that B is the midpoint of segment AC, find the unknown values.
shusha [124]
Hi! for x, you need to do 2x-8 = x+17 and solve, because since b is the midpoint, ab and bc would be congruent.

2x-8 = x+17
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in order to find ab, you plug in the x into the expression.

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3 years ago
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I think it might be C?
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