Question

solve for x and give answer to two decimal places 4x^2-7x+2=0

Answer 1

Answer:

hope it's helpful to you

Step-by-step explanation:

Given equation is x

2

+7x=7

⇒x

2

+7x−7=0

Using the quadratic formula, we get:

x=

2×1

−7±

49+28

⇒x=

2

−7±

77

=0.89,−7.89

Thus, there are two values of x i.e 0.89 and −7.89 (correct up to two decimal

Answer 2

Step-by-step explanation:

Given:

• 4n²-7n+2

To find:

• the value of n and
• two decimal place

Need formula:

The roots of quadratic equation an²+bn+c= 0and a≠ 0 are given by

n = -b ± √b²-4ac

2a

Solution:

Here is a= 4,b= -7 and c = 2

so we put this value in formula, we have

» n = -(-7) ± √ ( 7)² - 4×4×2

2×4

» n = 7 ± √ 49 -32

8

» n = 7 ± √ 17

8

» n = 7 - √17 and 7 + √17

8 8

» n = 7-4.12/8 and 7+4.12/8

» n = 2.88/8 and 11.12/8

» n = 0.36 and 1.39