Question

Evaluate each of the following algebraic expressions for x=1, y= -1, z=2, a= -2, b=1, c= -2.
ax+by+cz
ax² +by² - cz​

Answer 1

Step-by-step explanation:

ax^2+by^2+cz

(-2)(1)^2+(1)(-1)^2+(-2)(2)

(-2)(1)+(1)(1)+(-4)

-2+1-4= -5

ax^2+by^2-cz

(-2)(1)^2+(1)(-1)^2-(-2)(2)

(-2)(1)+(1)(1)-(-4)

-2+1+4= 3

Answer 2

Answer:

i) -7

ii) 3

Step-by-step explanation:

i) -2×1+1×-1+(-2×2)

-2+(-1)+(-4)

-2-1-4

-3-4

-7

ii) -2×(1²)+1×(-1²)-(-2×2)

-2×1+1×1-(-4)

-2+1+4

3