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If x=1;y=2 find the values of the following expressions

1). 4x-3y+5 2.) x² + y² 3) xy+3y-9

2
by subbarao

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1). 4x-3y+5 2.) x² + y² 3) xy+3y-9

by subbarao

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1) 4 * 1 - 3 * 2 + 5

= 4 - 6 + 5

**=** __3__

2) 1² + 2²

**= **__5__

3) 1 * 2 + 3 * 2 - 9

2 + 6 - 9

**= **__-1__

= 4 - 6 + 5

2 + 6 - 9