Question

simplify (3√7-5√2) (4√7+3√2)​

Answer 1

Answer:

We have ( 3√7 - 5√2 ) ( 4√7 + 3√2 )

= 3√7 (4√7 + 3√2) - 5√2 (4√7 + 3√2)

= 12√49 + 9√14 - 20√14 - 15√4

= (12×7) + 9√14 - 20√14 - (15×2)

= 84 - 11√14 - 30

= 84 - 30 - 11√14

= 54 - 11√14

Answer 2

$\huge\mathcal{\fcolorbox{purple}{azure}{\pink{➳Aɳʂɯҽɾ}}}$

We have ( 3√7 - 5√2 ) ( 4√7 + 3√2 )

= 3√7 (4√7 + 3√2) - 5√2 (4√7 + 3√2)

= 12√49 + 9√14 - 20√14 - 15√4

= (12×7) + 9√14 - 20√14 - (15×2)

= 84 - 11√14 - 30

= 84 - 30 - 11√14

= 54 - 11√14

$\purple{\rule{200pt}{5pt}}$