Question

calcule o valor numerico das expressoes algebricas 3x²+2x-y para x=4 e y=5 B)x²-4x+6y²+y para x=-3 e y=5

Answer 1

substitua o x e o y..3.16+2.4-5=45...      9-12+150+5=152

Answer 2

3X2 +2X –Y   para X = 4 e Y = 5

3.42 + 2.4 – 5 =   

    3.16 + 8 – 5 =  

    48 + 8 – 5 =    

  = 51                                                                                                                            X2 – 4X + 6Y2 + y  para X = 3 e Y = 5

32 – 4.3 + 6.52 + 5 =

9 – 12 + 6. 25 + 5=

9 – 12  + 150 + 5 =

= 158