Simplify the following expressions and find the value for x = -1 , y = 1 and z = 2 ( help me plz plz it's my exam ) fast plz plz plz help me a) ( 2x+y) + 3y ( y-z) -2x ( x-y )
b) ( x-2y) ( 3x² + 4xy - y²)
c) ( x³ + y³ - z³) ( 2x + y -z)

Step-by-step explanation:

a) ( 2x+y) + 3y ( y-z) -2x ( x-y )

↪ (2× -1 + 1) + 3 × 1 (1 - 2) - 2 × -1 (-1 -1)

↪ -1 + 3 × -1 × - 2 × -1 × -2

↪ -1 + 12 = 11 , answer

b) ( x-2y) ( 3x² + 4xy - y²)

↪ (-1 - 2 × 1) (3 × -1² + 4 × -1 × 1 - 1²)

↪ -3 × (- 3 - 1 - 4 - 1)

↪ -3 × -9

↪ 27, answer

c) ( x³ + y³ - z³) ( 2x + y -z)

↪ (-1³ + 1³ - 2³) (2 × -1 + 1 × -2³)

↪ (-1 + 1 - 8) (-2 - 8)

↪ -8 × -10 = 80, answer

the cat is blue because the probability of extension towards the prefix of the diameter of the circle could only mathematically equal to the sum of the roots of the carrots from   your garden.

step-by-step explanation: