a+b=9 ab=4 find a2+b2
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Answered by
4
Heya
_______________________________
a + b = 9
SQUARING BOTH SIDE'S
( a + b )² = 9²
=>
a² + b² + 2ab = 81
=>
a² + b² = 81 - 2 ( 4 )
=>
a² + b² = 73
_______________________________
a + b = 9
SQUARING BOTH SIDE'S
( a + b )² = 9²
=>
a² + b² + 2ab = 81
=>
a² + b² = 81 - 2 ( 4 )
=>
a² + b² = 73
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Answered by
6
Answer:
Step-by-step explanation:
( a + b )² = 9²
a² + b² + 2ab = 81
a² + b² = 81 - 2 ( 4 )
a² + b² = 73
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