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Amiraneli [1.4K]
2 years ago
7

If using the method of completing the square to solve the quadratic equation

Mathematics
2 answers:
lara [203]2 years ago
6 0

Answer:

x² + 7x + 10 = 0

Subtract 10 from both sides

x² + 7x = -10

Use half the x coefficent (7/2) as the complete the square term

(x + 7/2)² = -10 + (7/2)²

   note: the number added to "complete the square" is (7/2)² = 49/4

(x + 7/2)² = -10 + 49/4

(x + 7/2)² = 9/4

Take the square root of both sides

x + 7/2 = ±3/2

Subtract 7/2 from both sides

x = -7/2 ± 3/2

x = {-5, -2}

Katena32 [7]2 years ago
6 0
X2 cause it makes sense
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(x+6)(x-5) = x²+x-30
Nataly_w [17]

Answer:

0=0

Step-by-step explanation:

(x+6)(x-5) = x^2 + - 30

Step 1: Simplify both sides of the equation.

x^2 + x-30 = x^2 + x-30

Step 2: Subtract x^2 from both sides.

x^2 + x - 30 - x^2 = x^2 + x - 30 - x^2

x-30=x-30

Step 3: Subtract x from both sides.

x-30-x=30-x

-30 = - 30

step 4: Add 30 to both sides.

-30+ 30 = -30 + 30

0=0

5 0
3 years ago
20,485,163 in stanerd form
Thepotemich [5.8K]
20,000,000+400,000+80,000+5,000+100+60+3 if u meant expanded form
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5 0
3 years ago
Three groups of a number plus two.
Jet001 [13]
3x+2
of means multiply
8 0
3 years ago
I need this a.s.a.p please
vladimir1956 [14]

Answer:

You would multiply 38.3 time .40 which is the 40%

this would give us

=15.32

6 0
3 years ago
Solve the equation and show all work please show steps!!<br> m/9 - 17=21
masya89 [10]
Okay. The question is m/9 - 17 = 21. First off, we will add 17 to both sides. -17 + 17 cancels out. 21 + 17 is 38. That leaves m/9 = 38. Multiply each side by 9 to isolate the m, because m is the numerator and 9 is the denominator. m/9 * 9/1 cancels out. 38 * 9 is 342. Let's check this. 342/9 is 38. 38 - 17 is 21. 21 = 21. There. x = 342.
3 0
3 years ago
Read 2 more answers
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