If a+b=11 and ab=18,find a and b
Answers
Answered by
3
Answer:
±11
Step-by-step explanation:
a - b = 7
Squaring both sides,
=> (a - b)² = 7²
=> a² + b² - 2ab = 49
=> a² + b² = 49 + 2(18)
=> a² + b² = 85
Again,
(a + b)² = a² + b² + 2ab
= 85 + 2(18)
= 85 + 36
= 121
=> a+b = √12 = ±11
Answered by
1
a = 9
b = 2
Explanation :
Take the factors of 18
Make a perfect combination
That it ( hope this pic will help :)
b = 2
Explanation :
Take the factors of 18
Make a perfect combination
That it ( hope this pic will help :)
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