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OpenStudy (jaylokss):
I'll give MEDAL The expression representing the total length of the rope is 3a^3+8a^2b-b^3 If a = 2 inches and b = 3 inches, the total length of the rope is____ inches. 93 or 165??
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OpenStudy (prathamesh_m):
You've just got to substitute the values of a and b in that expression: 3(8) + 8(4)(3) - 27
OpenStudy (jaylokss):
A where you got the 4 from?
OpenStudy (prathamesh_m):
The second term is 8 times a squared times b right?
OpenStudy (prathamesh_m):
a squared is 4
OpenStudy (jaylokss):
Yawp thank you
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