Question

4.
What will be the value of a if 3x² + x + a equal to 8 when x=1?​

Answer 1

Answer:

4

Step-by-step explanation:

3x²+x+a=8

If a=1

3(1)²+1+a=8

=>3+1+a=8

=>a=4

Answer 2

$\huge\bold{\gray{\sf{Answer:}}}$

Explanation:

Given :x=1

$= > 3 {x}^{2} + x + a = 8$

$= > 3 {(1)}^{2} + 1 + a = 8$

$= > 3 + 1 + a = 8$

$= > 4 + a = 8$

$\bold{\green{ = > a = 4}}$

Check:-

$= > 3 {x}^{2} + + x + {\green{a}} = 8$

$= > 3 {(1)}^{2} + 1 + a = 8$

$= > 3 + 1 +{\green{ 4}} = 8$

$= > 4 + 4 = 8$

additional information:

• $3 {x}^{2} + x + a = 8$ is in the form of a quadratic here ,higest degree is 2.
• The value of a =4 which is a composite number as it have more than 2 factor.e.g=>1,2&4 .
• 4 can also be written as 2×2 or ${2}^2$