If x+y=15 and x*y=45 so x^2+y^2 =?
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⭐⭐⭐⭐⭐ ANSWER ⭐⭐⭐⭐⭐
❤❤❤❤ STEP-BY-STEP ❤❤❤❤
Given, x+y = 15 ; xy = 45
So, x + y = 15.
Squaring both sides, we get :
(x+y)² = (15)²
=> x²+2xy+y² = 225
=> x²+y² = 225-2xy
=> x²+y² = 225-(2×45)
=> x²+y² = 225-90
=> x²+y² = 135 [Ans.]
⭐⭐⭐ ALWAYS BE BRAINLY ⭐⭐⭐
❤❤❤❤ STEP-BY-STEP ❤❤❤❤
Given, x+y = 15 ; xy = 45
So, x + y = 15.
Squaring both sides, we get :
(x+y)² = (15)²
=> x²+2xy+y² = 225
=> x²+y² = 225-2xy
=> x²+y² = 225-(2×45)
=> x²+y² = 225-90
=> x²+y² = 135 [Ans.]
⭐⭐⭐ ALWAYS BE BRAINLY ⭐⭐⭐
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