Question

• 1/2-√3 find
•5/2-2√3 find
• 3/7+3√2 find
• 9/3-2√3 find

Please solve it with step by step..​

Answer 1

Answer:

(i) (-12)³ + (7)³+ (5)³

Let x = -12, y =7&z=5 x+y+z= -12 +7 +5=0

Here, x + y + z = 0

We know that if,

x + y + z = 0, then x² + y² + z² = 3xyz = (-12)³ + (7)³ + (5)³ = 3(-12)(7)(5) = -1260

(-12)³+ (7)³+ (5)³ = - 1260

(ii) (28)³ + (−15)³ + (-13)3³

Let x = 28, y = -15 and z = -13

x+y+z = 28-15-13-0

Here, x + y + z = 0

We know that if, x + y + z = 0, then x³ +y³ + z³ = 3xyz 3

(28) ³+ (−15)³ + (-13)³ = 3(28)(-15)(-13) = 16380

(28) ³+ (−15)³ + (-13)³ = 16380