Question

plz someone help to do this no. ​

Answer 1

Step-by-step explanation:

3a + 2b = 23

ab = 20 => b = 20/a ( substituting this in prev. Eq )

3a + 2( 20/a) = 23

3a^2 + 40 = 23a

3a^2 - 23a + 40 = 0

X = - (-23) + or - root b^2 - 4ac / 2a ( quadratic formula)

= 23 + or - root 529 - 4(3)(40) / 2(3)

= 23 + or - root 529 - 480 / 6

= 23 + or - root 49 / 6

= 23 + or - 7 /6

= 23 + 7/6 => 30/6 => 5

= 23 - 7/6 => 16/6 => 8/3

Therefore a = 5

b = 20/5

b = 4

a = 5, b = 4

Hope it helps you

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