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just plug them in.

(-5/2)*((-5/2)+(15/4))

come on, you can finish the rest...

(-5/2)*((15/4) - (10/4))

(-5/2)*(5/4) = -25/8

mikevucina do you get how to do it?

i do know

now

do you know the order of operations?

ye

what comes first parentheses or multiplication? pop quiz lol

parentheses

nice

okay 3x squared when x= -1.5 is 6.25?

what comes first, exponents or multiplication?

exponents

btw im just learning this myself with you

true

bahrom do you square the integer first and then multiply by 3?

square number first then integer i think

i think you square the x (which is -1.5 and then multiply by 3

unless its (3x)squared

it is

because parentheses comes before exponents

sorry where?

3x squared when x= -1.5

depends on the parenthesis

question is 3x squared + 5x - 12 when x= -1.5

are there parentheses?

no

so exponents come first, -1.5^2 = what?

2.25

so now rewrite the equation

with the new piece of info

6.75 + 5x - 12

boom, and we can go ahead and do the 5x, its 5 * 2.25

oops

i mean 5 *x or 5* -1.5

can you do that and then rewrite the equation with the new info?

the answer should be 19.25 but i got 11.25?

hmmm, guess we need help, im asking bahrom

can you guys draw out the actual question?

question is 3x2 + 5x - 12 where x = -1.5

3x^2

3*(-1.5)^2+5*(-1.5)-12=
3*(2.25)-5*(1.5)-12

howd you make it -5 in the second line?

6.75-7.5-12= -12.5

5*(-1.5) that negative in front of -1.5 makes the whole thing negative

answer is supposed to be 19.25

|dw:1329168853490:dw|

it says that in the book

and bahroom thats the equation

the book's wrong

mike does bahrom's answer make sense to you?

ye it does

if so, forget the book

and show your teacher

thanks bahrom, im giving him a medal for this, for sure

lol finally haha medals...

lol win! good luck mike, cya around