Answer:
The equation (i) is the only algebraic equations.
Step-by-step explanation:
From the given examples of equations the equation (i) is the only algebraic equations.
(i) 3.1x - 11.2 = 2.5x + 2.3.
This is an example of algebraic equation with single variable x.
(ii) ???? + ???? = 2????
This could be an equation with variable ???? but both the sides being equal they cancel each other and no equation remains.
(iii) 1/2 +1/2 = 2/4
This is not an algebraic equation since there is no variable. (Answer)
Answer:
Numeric expressions apply operations to numbers. For example, 2(3 + 8) is a numeric expression. Algebraic expressions include at least one variable and at least one operation (addition, subtraction, multiplication, division). For example, 2(x + 8y) is an algebraic expression.
Step-by-step explanation:
Answer:
x=5 twice
Step-by-step explanation:
x^2-10x+25=0
multiply the coefficient of x^2 and the last term
1X25=25
find two numbers you can multiply to get 25 and add to get -10
-5 + (-5)=-10 the middle term
replace -10x with -5x -5x and solve the equation
x^2-5x-5x+25=0
factorise by grouping
x(x-5)-5(x-5)=0
(x-5)(x-5)=0
Either x-5=0,x=5 or x-5=0,x=5
Therefore x=5 twice.