Question

If x = 1, y = 2 and z=5, find the value of
(1) 3x - 2y + 4z
(ii) x + y2 + 2
(iii) 2x2-3y2+z2
(iv) xy + yz - ZX
(v) 2x²y - 5yz + xy2
z3​



PLEASE GIVE FAST AN

Answer 1

Answer:

1) 19, 7, 17, 7

Step-by-step explanation:

1) 3x-2y+4z = 3-4+20 = 23-4 = 19

2) 1+4+2 =7

3) 4-3(4)+25 = 4-12+25 = 29-12 = 17

4) 2+10-5 = 12-5 = 7

Answer 2

Answer:

3(1) - 2(2) + 4 (5)

3-4+20

3-16

-13

1+2(2)+2

1+4+2

7

2(1) × 2 -3(2) + (5)square

2×2-6+25

4-6+25

-2+25

23.

(1)(2)+(2)(5) - (5)(1)

2+10-5

2+5

7

2(1)square(2)-5(2)(5)+ (1)(2) square

4-50+4

46+4

50