Mister Exam
Other calculators
-
How to use it?
- Equation:
-
Equation cos(4*x)=0
-
Equation x^2-21=4x
-
Equation 5x-9=3x+1
-
Equation x:12=17
- Express {x} in terms of y where:
- -12*x+17*y=-11
- -8*x-16*y=18
- -10*x-19*y=3
- -17*x+1*y=19
-
Identical expressions
- (sqrt(twenty-one)/ seven)*x= one
- ( square root of (21) divide by 7) multiply by x equally 1
- ( square root of (twenty minus one) divide by seven) multiply by x equally one
- (√(21)/7)*x=1
- (sqrt(21)/7)x=1
- sqrt21/7x=1
- (sqrt(21) divide by 7)*x=1
(sqrt(21)/7)*x=1 equation
The teacher will be very surprised to see your correct solution 😉
The solution
Detail solution
Given the linear equation:
Expand brackets in the left part
Divide both parts of the equation by sqrt(21)/7
We get the answer: x = sqrt(21)/3
(sqrt(21)/7)*x = 1
Expand brackets in the left part
sqrt/7+21/7)*x = 1
Divide both parts of the equation by sqrt(21)/7
x = 1 / (sqrt(21)/7)
We get the answer: x = sqrt(21)/3
Sum and product of roots
[src]
sum
____ \/ 21 ------ 3
$$\frac{\sqrt{21}}{3}$$
=
____ \/ 21 ------ 3
$$\frac{\sqrt{21}}{3}$$
product
____ \/ 21 ------ 3
$$\frac{\sqrt{21}}{3}$$
=
____ \/ 21 ------ 3
$$\frac{\sqrt{21}}{3}$$
sqrt(21)/3