All categories

2 years ago

How to solve this problem by completing the square 6x^2 − 8x + 7= 0

Mathematics

1 answer:

melisa1 [442]2 years ago

4 0

Step-by-step explanation:

For this equation: a=6, b=-8, c=7

6x2+−8x+7=0

Step 1: Use quadratic formula with a=6, b=-8, c=7.

x=−b±√b2−4ac2a

x=−(−8)±√(−8)2−4(6)(7)2(6)

x=8±√−10412

You might be interested in

Math: Slope help please

pishuonlain [190]

Slope = (2+5)/(-3-1) = 7/-4 = -7/4

answer is B -7/4

3 0

2 years ago

Read 2 more answers

Find the slope of the line that passes through (-53, -2) and (-54, 91).

cricket20 [7]

Answer:

x1=-53 y1=-2

x2=-54. y2=91

slopes= y2-y1

---------

x2-x1

91-(-2)

-----------------

= -54-(-53)

91+2

= ----------

-54+53

= 93

-------

-1

8 0

2 years ago

Solve the system by substitution.<br> x – 4y = -8<br> 5у – 1 = x<br> Submit Answer

Vikki [24]

Answer:

y = -7 and x = -36

Step-by-step explanation:

x - 4y = -8

5y - 1 = x

→ Substitute 5y - 1 into x - 4y = -8

5y - 1 - 4y = -8

→ Simplify

y - 1 = -8

→ Add 1 to both sides

y = -7

→ Substitute y = -7 into 5y - 1

( 5 × -7 ) - 1 = -36

7 0

3 years ago

Read 2 more answers

If numerator is 2 less than the denominator of a rational number and when 1 is subtracted from numerator and denominator both, t

xenn [34]

Answer:

$\frac{3}{5}$

Step-by-step explanation:

Let the denominator be x
So, numerator = x - 2
According to the given condition: when 1 is subtracted from numerator and denominator both, the resulting new rational number in its simplest form is $\frac{1}{2}$

$\implies \frac{x-2-1}{x-1}=\frac{1}{2}$

$\implies \frac{x-3}{x-1}=\frac{1}{2}$

$\implies 2(x-3)=x -1$

$\implies 2x-6=x -1$

$\implies 2x-x=6-1$

$\implies x=5$

$\implies x-2=-5-2= 3$

$Required \: rational\: number = \frac{3}{5}$

6 0

2 years ago

Which of the following expressions is correctly written in scientific notation

katrin [286]

Answer:

it is the 3 one

Step-by-step explanation:

7 0

2 years ago