Let M=4a^2 - 2b^2 +a. Let j be the value of M when a=5 and b=2, and let k be the value of M when a=1 and b=4. Calculate j+2k.
j = 4(5)^2 - 2(2)^2 + 5 = 97
2k = 2 [ 3(1)^2 - 2(4)^2 + 1 ] = 2 [ -28 ] = -56
j + 2k =
97 - 56 =
41
