Question

if x is equal to 1 and Y is equal to 2 find the values of the following expressions i 4 x minus 3 Y + 5 ii x square + Y square iii xy + 3 Y - 9​

Answer 1

X=1,y=2

4x-3y+5=4x1-3x2+5=3

Xsq+Ysq=1+4=5

Xy+3y-9=1x2+3x2-9=-1

Answer 2

Answer:

i)3 ; ii)5 ; iii) -1

Step-by-step explanation:

i.4x-3y+5(x=1,y=2)

4 x 1 - 3 x 2 + 5

4 - 6 + 5

-2 +5

3

ii. x square + y square

1 x 1 + 2x 2

1+4

5

iii.xy + 3y - 9

1 x 2 + 3 x 2 - 9

2 + 6 - 9

2 - 3

-1