a+b =9 ,ab=20 a2+b2 is
Answers
Answered by
128
Hi ,
It's given that ,
a + b = 9 ,
ab = 20
a² + b² = ( a + b )² - 2ab
= 9² - 2 × 20
= 81 - 40
= 41
I hope this helps you .
: )
It's given that ,
a + b = 9 ,
ab = 20
a² + b² = ( a + b )² - 2ab
= 9² - 2 × 20
= 81 - 40
= 41
I hope this helps you .
: )
Answered by
28
Answer:
Answer is 41
Step-by-step explanation:
If a+b=9and ab=20
given:
a+b=9;on squaring becomes 81
a^2+b^2 +2ab =81
a^2+ b^2 +2×20=81
a^2+b^2 =81-40
a^2+ b^2=41
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