C-05-Q024mediumsingle_mcq

The equality $(x + 1)^2 - (x - 1)^2 = 4x$ is—

aan equation only
ban identity
cinvalid
dtrue only when $x = 0$

ব্যাখ্যা

Expanding gives $(x+1)^2 - (x-1)^2 = (x^2+2x+1) - (x^2-2x+1) = 4x$ , which is true for every value of $x$ . Since it holds for all $x$ , it is an identity.

এই অধ্যায়ের আরও প্রশ্ন

C-05-Q025Which statement is correct?
C-05-Q026An identity is satisfied by—
C-05-Q027The proper sign used for an identity is—
C-05-Q028is—
C-05-Q029is an example of—
C-05-Q030The equation is satisfied by—
C-05-Q031Which of the following is an identity?
C-05-Q032If the same number is added to both sides of an equation, the two sides—
C-05-Q033If both sides of an equation are multiplied by the same nonzero number, the two sides—
C-05-Q034If , then by transposition—

Equations in One Variable — সব প্রশ্ন দেখুন (170টি) →

The equality $(x + 1)^2 - (x - 1)^2 = 4x$ is—

aan equation only

ban identity

cinvalid

dtrue only when

x = 0

ব্যাখ্যা

Expanding gives $(x+1)^2 - (x-1)^2 = (x^2+2x+1) - (x^2-2x+1) = 4x$ , which is true for every value of $x$ . Since it holds for all $x$ , it is an identity.

The equality (x+1)2−(x−1)2=4x(x + 1)^2 - (x - 1)^2 = 4x(x+1)2−(x−1)2=4x is—

ব্যাখ্যা

এই অধ্যায়ের আরও প্রশ্ন

The equality (x+1)2−(x−1)2=4x(x + 1)^2 - (x - 1)^2 = 4x(x+1)2−(x−1)2=4x is—

ব্যাখ্যা

এই অধ্যায়ের আরও প্রশ্ন

The equality $(x + 1)^2 - (x - 1)^2 = 4x$ is—

The equality $(x + 1)^2 - (x - 1)^2 = 4x$ is—