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Naily [24]
3 years ago
15

X² - 8x - 33=0 complete the square

Mathematics
1 answer:
Andreas93 [3]3 years ago
8 0
<h2>Answer:</h2><h2></h2><h2>\boxed{x_{1}=-3} \\ \\ \boxed{x_{2}=11}</h2>

<h2>Explanation:</h2>

Step 1. Write x^2 - 8x - 33=0 in the form x^2+2ax+a^2=0

2a=-8\quad :\quad a=-4

Step 2. Add and subtract (-4)^2 to the left side of the equation

x^2-8x-33+\left(-4\right)^2-\left(-4\right)^2=0 \\ \\ \\ But: \\ \\  x^2+2ax+a^2=\left(x+a\right)^2 \\ \\ x^2-8x+\left(-4\right)^2=\left(x-4\right)^2

Step 3. Complete square

\left(x-4\right)^2-33-\left(-4\right)^2=0 \\ \\ \left(x-4\right)^2-49=0 \\ \\ (x-4)=\pm \sqrt{49} \\ \\ x-4=\pm 7 \\ \\ \boxed{x_{1}=-3} \\ \\ \boxed{x_{2}=11}

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Scrat the squirrel has a few nuts. When he put them in groups of 5 nuts, two nuts were left, and
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The options are not shown, so i will solve this in a general way.

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<h2>the answer is true. ☺</h2>

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