Math  /  Algebra

QuestionSolve by completing the square. h26h=41h^{2}-6 h=41
Write your answers as integers, proper or improper fractions in simplest form, or decimals rounded to the nearest hundredth. h=h= \square or h=h= \square Submits

Studdy Solution

STEP 1

What is this asking? We're asked to solve a quadratic equation by completing the square, meaning we need to manipulate the equation into a perfect square trinomial form and then solve for hh. Watch out! Remember that when we complete the square, we're adding a value to *both* sides of the equation to keep it balanced!
Also, don't forget to consider both positive and negative square roots when solving.

STEP 2

1. Set up the equation for completing the square.
2. Complete the square.
3. Isolate the squared term.
4. Take the square root of both sides.
5. Solve for hh.

STEP 3

Alright, let's **get this party started**!
We already have our equation set up nicely with the hh terms on one side and the constant on the other: h26h=41h^2 - 6h = 41

STEP 4

Now, let's **complete the square**!
We take half of the coefficient of our hh term, which is 6-6, so half of that is 3-3.
Then, we square it: (3)2=9(-3)^2 = 9.
This **magical number**, 99, is what we add to *both* sides of the equation: h26h+9=41+9h^2 - 6h + 9 = 41 + 9

STEP 5

This gives us: h26h+9=50h^2 - 6h + 9 = 50 Now, the left side is a **perfect square trinomial**!

STEP 6

We can rewrite that **beautiful** left side as a squared binomial: (h3)2=50(h - 3)^2 = 50 Look at that – much cleaner!

STEP 7

Time to **unleash the square root** on both sides!
Remember, we need to consider both the positive and negative square roots: (h3)2=±50\sqrt{(h - 3)^2} = \pm\sqrt{50} This simplifies to: h3=±50h - 3 = \pm\sqrt{50}

STEP 8

Let's **simplify** that 50\sqrt{50}.
Since 50=25250 = 25 \cdot 2, we have 50=252=52\sqrt{50} = \sqrt{25} \cdot \sqrt{2} = 5\sqrt{2}.
So, we get: h3=±52h - 3 = \pm 5\sqrt{2}

STEP 9

Almost there!
We just need to **isolate** hh by adding 33 to both sides: h=3±52h = 3 \pm 5\sqrt{2}

STEP 10

This gives us two possible solutions for hh: h=3+52h = 3 + 5\sqrt{2} and h=352h = 3 - 5\sqrt{2}

STEP 11

h=3+52h = 3 + 5\sqrt{2} or h=352h = 3 - 5\sqrt{2}

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