This problem addresses some common algebraic errors. for the equalities stated below assume that x and y stand for real numbers. assume that any denominators are non-zero. mark the equalities with t (true) if they are true for all values of x and y, and f (false) otherwise.

1. (x+y)^2 =x^2+y^2 __

2. (x+y)^2 = x^2 +2xy+y^2__

3. x/x+y=1/y__

4. x−(x+y) = y__

5. √x^2 =x__

6. √x^2 = |x|__

7. √x^2+4=x+2__

8. 1/x+y=1/x+1/y__

1. F

observe that

2. T

Let x and y real numbers.

3. F

Observe that if x=3 and y=2

4. F

If x=y=3,

5. F

if x=-1,

6. T

7. F

if x=-1,

8. F

If x=1 and y=2,

pakistan's principal natural resources are arable land and water. about 25% of pakistan's agriculture accounts for about 21% [1] of gdp and employs about 43% of the labour force. in pakistan, the most agricultural province is punjab where wheat and cotton are the most grown.

0.02

step-by-step explanation:

time of 9 192 631 770 periods of the radiation corresponding to the transition between the 2 hyperfine levels of the ground state of the caesium 133 atom at 0 k (but other seconds are sometimes used in astronomy)