1) 3[tex]x^{2} \\[/tex] cuando x= -1
3([tex]-1^{2} \\[/tex]) = 3(1) = 3
2) -2[tex]x^{2} \\[/tex] + 4x - 2 cuando X = -2
-2([tex]-2^{2}[/tex]) + 4(-2) -2
-2( 4 ) - 8 -2
-8 - 8 -2 = -18
3) [tex]x^{2} \\[/tex]y - xy -8 cuando x = -1 e y= +2
([tex]-1^{2} \\[/tex])( 2 ) - (-1)(2) - 8
2 + 2 -8 = -8
4) 3a[tex]b^{2}[/tex] -[tex]2a^{2} b - a^{2} b^{2}[/tex] cuando a= -3 y B= -2
[tex]3(-3)(-2^{2}) - 2(-3^{2})(-2) -(-3^{2} ) (-2^{2} )[/tex]
-36 + 36 - 36 = -36
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Verified answer
1) 3[tex]x^{2} \\[/tex] cuando x= -1
3([tex]-1^{2} \\[/tex]) = 3(1) = 3
2) -2[tex]x^{2} \\[/tex] + 4x - 2 cuando X = -2
-2([tex]-2^{2}[/tex]) + 4(-2) -2
-2( 4 ) - 8 -2
-8 - 8 -2 = -18
3) [tex]x^{2} \\[/tex]y - xy -8 cuando x = -1 e y= +2
([tex]-1^{2} \\[/tex])( 2 ) - (-1)(2) - 8
2 + 2 -8 = -8
4) 3a[tex]b^{2}[/tex] -[tex]2a^{2} b - a^{2} b^{2}[/tex] cuando a= -3 y B= -2
[tex]3(-3)(-2^{2}) - 2(-3^{2})(-2) -(-3^{2} ) (-2^{2} )[/tex]
-36 + 36 - 36 = -36