2r2 + 3s3 − r2 + 4t2 − r2 if r = −2, s = −3, and t = 5.

First, simplify the expression Here you have three terms with group them in the following way:

Then substitute s=-3 and t=5:

19.

19

Step-by-step explanation:

Given the formula:

2r^2 + 3s^3 − r^2 + 4t^2 − r^2  

Replace with these values r = −2, s = −3, and t = 5 and compute the result.

2(-2)^2 + 3(-3)^3 − (-2)^2 + 4(5)^2 − (-2)^2  =

= 2*4 + 3*(-27) - 4 + 4*25 - 4 =

= 8 - 81 - 4 + 100 - 4 =

= 19

step-by-step explanation:

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throw the computer

step-by-step explanation: