Hello :
<span>√(4x+13) = 2x-1......(1)
note : if ( a=b) so (a² = b²)
if : (</span>√(4x+13) )²= (2x-1)² so : 4x+13 = 4x²-4x+1
4x²-8x-12 = 0
x²-2x-3 = 0
(x+1)(x-3) = 0
x+1 = 0 or x-3=0
x= -1 or x=3
if : x= -1 : <span>√(4(-1)+13) = 2(-1)-1
</span>√9 =-3 but √9 =3
3 = -3 impossible ( -1 is not solution of equation (1)
if : x = 3 : √(4(3)+13) = 2(3)-1
5 = 5 ( right) conclusion : one solution : 3
Answer:
Step-by-step explanation:
2√28 - 3√63
4√7 - 9√7
- 5√7
Hello, I Am BrotherEye
Answer:
x -1 = Sqrt6
Step-by-step explanation:
D.) Is the Proper Answer
A and D both look correct
Definitely not B and C because the signs are not correct
We can model the trip of the clock hand as shown in the picture below:
The clock hand is of the same length, '
' and it forms a right-angle triangle from 1:15 to 1:30
We can use the Pythagoras theorem to find the length of the minute hand
Answer : 10.6 (to the nearest tenth)