Question

if x2-21x+20=0find the value of x? ​

Answer 1

Step-by-step explanation:

=> x² - 21x + 20 = 0.

with respect to Standard form

• a = 1
• b = -21
• c = 20

Using the Quadratic formula we have ,

=> x = -b ± √ b² - 4ac / 2a

=> x = -(-21)± √ (-21)² - 4×1×20 / 2×1

=> x = 21 ± √ 441 - 80 / 2.

=> x = 21 ± √ 361 / 2

=> x = 21 ± 19 /2

=> x = 21 + 19/2 , 21 - 19 / 2

=> x = 40 /2 , 2/2.

→ x = 20 , 1 .

$\huge{\boxed{\red{\bf\green{\dag} x = 20 , 1}}}$

Answer 2

Answer:

1.4 11 20 0

x x2.5 24 0 x x

Step-by-step explanation: