Help me solve this

(3x²y) - (2xy²) + (10xy) - (15y) for x= -5, y=3

(3(-5)²(3)) - (2(-5)(3)²) + (10(-5)(3)) - (15(3)) =

9*25   + 90   - 150 - 45   =

225 -150  + 45   = 

75 + 45  = 

120

I like to separate these into parentheses to make it easier to solve

(3x²y) - (2xy²) + (10xy) - (15y) for x= -5, y=3

(3[-5]²[3]) - (2[-5][3]²) + (10[-5][3]) - (15[3])

(3[25][3]) - (2[-5][9]) + ([-50][3]) - (15[3])

(225) - (90) + (-150) - (45)

(135) + (-195) = 60

So, if I did everything correctly, the answer is 60.

Hi NinjaDevo,

You have just messed up with your minus signs.  that's all.  You always have to be very careful with those.  They  are nasty little creatures!

I think i'll give him thumbs-up for a good attempt !!!....those minus signs are tricky !!

Heck...I hope I got it right !!

Yours looks right.

Ah, I see.

It should be - (-90), or + (+90)

Sorry about that, but thanks for the correction.