Question

Find the value of x in ³✓28x-21 -7 =0
(A) 10 B) 7 (C) 108 (C) 14 (D) 72 (D) 13​

Answer 1

Answer:

d)13

Step-by-step explanation:

given ,

$3 \sqrt{28x - 21} - 7 \: \: \: \: = 0$

cubing both side ,

28x - 21 -(7)^3 = 0

==》28x -21 -343 =0

==》28x - 364 = 0

==》28x=364

==》x=13