Question

Find the values of the given algebraic expression for x = 1 and y=-1.
(1) 32 + 4xy
(ii) - 72 +22 (i) -19cy + 3xy + 4​

Answer 1

Answer:

Given an algebraic expression, ax2+by2−cz2

and values x=1,y=−1,z=2,a=−2,b=1  and   c=−2

Put all the values in given expression,

= (−2)×12+(1)×(−1)2−(−2)×22

= (−2)×1+(1)×(1)−(−2)×4

= −2+1+8

= −2+9

= 7

Step-by-step explanation:

Answer 2

Answer:

Given an algebraic expression,

ax2+by2-cz2

and values x=1y=-1,z=2,a=-2.b=1 and

c-2

Put all the values in given expression,

= (-2)x12+(1)*(-1)2-(-2)*22

=(-2)x1+(1)-()--2)x4

= -2+1+8

=-2+9

7