di ketahui ×=26,y=23,dan z=19.tentukanlah : a.2x - 3y +z b.x + y - z c.x² - y² +z d.(x - y)² + 3z

a ) 2x - 3y + z
@ 2(26) - 3(23) + 19
@ 52 - 69 + 19
@ 2

b) x + y - z
@ 26 + 23 - 19
@ 30

c) x^2 - y^2 + z
@ (26)^2 - (23)^2 + 19
@ 676 - 529 + 19
@ 166

d) (x-y)^2 + 3z
@ (26-23)^2 + 3(19)
@ (3)^2 + 57
@ 9 + 57
@ 66

Semoga membantu.. ^_^

1. (2*26) - (3*23) + 19 = 52 - 69 + 19 = 2
2. 26 + 23 - 19 = 30
3. 26² - 23² + 19 = 676 - 529 + 19 = 166
4. (26-23)² + (3*19) = (3)² + 57 = 9 + 57 = 66