Math, asked by baidsweta98, 5 months ago

5
Simplify the following expressions.
(i) 3x(x + y - 1) - 2(x2 + xy - x)
(ii) 5(x2 - y2) - (2x - 3y) + x(2x - 3y)
(iii) 4x2(x - 2y) + (3x3 -- x²y) - 5y(2x2 - 2)
(iv) 2(x + 2xy) - 2y(3-2y) + xly-2x)​

Answers

Answered by dishant7604
1

Step-by-step explanation:

3x^2 + 3xy - 3x - 2x^2 + 2xy - 2x

3x^2 - 2x^2 + 3xy + 2xy - 3x - 2x

x2 - 5xy - 5x Answer

Answered by Anonymous
8

Question :-

Which of the following expressions are polynomials in one variable and which are not? State reasons for your answer.

(i) 4x^2 – 3x + 7

(ii) y^2 + √2

(iii) 3 √t + t√2

(iv) y+ 2/y

(v) x^10+ y^3+t^50

Answer :-

(i) We have 4x^2 – 3x + 7 = 4x^2 – 3x + 7x^0

It is a polynomial in one variable i.e., x

because each exponent of x is a whole number.

(ii) We have y^2 + √2 = y^2 + √2y^0

It is a polynomial in one variable i.e., y

because each exponent of y is a whole number.

(iii) We have 3 √t + t√2 = 3 √t^1/2 + √2.t

which is not a whole number.

(iv) We have y + y+2/y = y + 2.y^-1

It is not a polynomial, because one of the exponents of y is -1,

which is not a whole number.

(v) We have x^10+  y^3 + t^50

Here, exponent of every variable is a whole number, but x^10 + y^3 + t^50 is a polynomial in x, y and t, i.e., in three variables.

So, it is not a polynomial in one variable.

Plz mrk as brainliest ❤

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