Question

help me please help me ​

Answer 1

Answer:

Q1. $\sqrt{5}$x⁴

Q2. (163 - 162)(163 + 162) =65x

      325 = 65x

      x = 5

Q3.  (x² + 1/x² )² = x⁴ + 1/x⁴ + 2

       x² + 1/x² = $\sqrt{2+2}$

                     = ±2

        (x + 1/x) ²=  x² + 1/x² +2

          x + 1/x   =  $\sqrt{2+2}$

                       =  ±2

Q4. Let the sum of money be Rs x

  SI = PTR/100

   6000 = (10 x 2 x x)/100

   x = Rs 30, 000

CI = P[( 1 + r/100)^n - 1]

   = 30,000[(1 + 10/100)² -1]

   = 30,000 x (11² -10²)/10²

   = Rs. 6300

Q5. Picture attached, can be checked by multiplying quotient by x +3 to get the dividend.

Q6. { 9(x+1) + 5(y+2) }²

     = (9x + 9 + 5y + 10)²

    = (9x + 5y  + 19)²

Q7. [y² - 10y + 9y - 90]/(y-10)

   = y(y-10) +9(y-10)/(y-10)

   = (y+9)(y-10)/(y-10)

   = y + 9

Q8. Picture attached, answer is 5%