31^12×(2x)^2 = 6^12 then x equals to
a. -6
b. +6
c. 12
d. K="6
Answers
Answered by
4
Answer:
option c)12, but it comes as 12.5
rohanniroula88:
how
shall I give the explanation friend
yes please
but according to my book answer is +6...i dont know the process
31^12×2x=6x. 2x=6^12-31^12. x= -25/2. after simplification =12.5
mark as Brainlist friend please
how can 31^12 change to minus.it must be in divide side rather than minus(-)
Answered by
1
Answer:
The question is wrong. It should be like this: 3¹²×(2ˣ)² = 6¹² then x equals to
Step-by-step explanation:
3¹²×(2ˣ)² = 6¹²
(2ˣ)² = 6¹² / 3¹²
2²ˣ = (3¹² × 2¹²) / 3¹² [since 6 = 3×2 and (a×b)ˣ = aˣ × bˣ ]
2²ˣ = 2¹² [cutting off 3¹² in numerator and denominator]
2x = 12
x = 12/2
x = 6
So the answer is +6.
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