Question

if 7a+i(3a-b)=21+3 i then find a and b

Answer 1

Answer:

$\Huge\underline{\overline{\mid\star{\mathfrak{\red{♪Solution:—}}\star\mid}}}$

Given ,

7a + i( 3a - b ) = 21 + 3i

• Comparing the real and imaginary part we get,

7a = 21

=> a = 21/7

=> a = 3

And 3a - b = 3

=> 3 × 3 - b = 3

=> 9 - b = 3

=> b = 9-3

=> b = 6

So,

• a = 3
• b = 6