Question

if x is equal to 1 by 2 minus root 3 find value of x cube minus 2 x square - 7 x + 5​​

Answer 1

Answer:

value of x³ - 2x² -7x + 5 is 3.

Step-by-step explanation:

Given:

To find: Value of x³ - 2x² -7x + 5

First we simplify the x,

Now, we find x²,

Now, we find x³,

Now,

x³ - 2x² -7x + 5

= ( 26 + 15√3 ) - 2( 7 + 4√3 ) - 7( 2 + √3 ) + 5

= 26 + 15√3 - 14 - 8√3 - 14 - 7√3 + 5

= 26 + 15√3 - 14 - 8√3 - 14 - 7√3 + 5

= 3

Therefore, value of x³ - 2x² -7x + 5 is 3

follow me

Answer 2

Answer:

ans is 3

Step-by-step explanation:

• its a little tricky but hope it helps