Write the expanded form of (9a + 4b + 5c)2.
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A.
81a2 + 16b2 + 25c2 + 72ab + 35bc + 90ac
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B.
81a2 + 16b2 + 25c2 + 72ab + 40bc + 100ac
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C.
81a2 + 16b2 + 25c2 + 72ab + 40bc + 90ac
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D.
81a2 + 16b2 + 25c2 + 76ab + 40bc + 90ac
Correct Answer:
C. 81a2 + 16b2 + 25c2 + 72ab + 40bc + 90ac
Explanation:
The logic follows a consistent pattern of alphabetical shifts for each letter position: -4, -4, +5, and -5.
Applying this to the first pair (SKIB to OGNG):
S (-4) = O
K (-4) = G
I (+5) = N
B (-5) = G (counting backwards from B: A, Z, Y, X, W, V... actually, B is 2, G is 7, so +5; I is 9, N is 14, so +5. Let's re-evaluate.)
Refined Logic:
1st letter: -4 (S to O; C to Y; Q to M)
2nd letter: -4 (K to G; U to Q; I to E)
3rd letter: +5 (I to N; C to H; R to W)
4th letter: +5 (B to G; V to A; K to P)
Applying this to QIRK:
Q minus 4 positions is M.
I minus 4 positions is E.
R plus 5 positions is W.
K plus 5 positions is P.
Therefore, QIRK is related to MEWP.
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