Let's assume
Mark's present age is x
so, his age 2 years ago will be
Marks age, X is six times his age 2 years ago
so, we will get equation as
.............Answer
A works because it due to laws of exponents
B works because (3*3)^x= (9)^x through simple multiplication
C does not work because
D does not work because
E does not work because
F does not work because
Answer:
the square root would be 10.4
it is either 5 cm or its 4 cm
Answer:
C
Step-by-step explanation:
x² + 6x = 18
To complete the square, take the coefficient of the x term, halve it, square the result, then add to both sides.
(6/2)² = 3² = 9
x² + 6x + 9 = 18 + 9
(x + 3)² = 27
x + 3 = ±√27
x = -3 ± √27