Advertisements
Advertisements
प्रश्न
The factors of x2 – 4 are ______.
विकल्प
(x – 2), (x – 2)
(x + 2), (x – 2)
(x + 2), (x + 2)
(x – 4), (x – 4)
Advertisements
उत्तर
The factors of x2 – 4 are (x + 2), (x – 2).
Explanation:
We have,
x2 – 4 = x2 – 22
= (x + 2)(x – 2) ...[∵ a2 – b2 = (a + b)(a – b)]
Hence, (x + 2), (x – 2) are factors of x2 – 4.
APPEARS IN
संबंधित प्रश्न
For the expression, given below, state whether it is a monomial, binomial or trinomial:
2x ÷ 15
Write the coefficient of: z2 in p2yz
In -5x3y2z4 ; write the coefficient of: z2 Also, write the degree of the given algebraic expression.
Fill in the blank:
4a + 3b – 7a + 4b = _____
Find the sum of:
9ax – 6bx + 8, 4ax + 8bx – 7 and – 6ax – 4bx – 3
Simplify: `"p"^2 - ["x"^2 - {"x"^2 - ("q"^2 - bar("x"^2 - "q"^2)) - "2y"^2}]`
Find the missing term
6xy × _________ = –12x3y
Factorisation of – 3a2 + 3ab + 3ac is 3a(– a – b – c).
Identify the numerical coefficient of term (other than constant) in the following expression:
x + 2xy + 3y
Find the numerical coefficient of the terms:
10xyz, –7xy2z, –9xyz, 2xy2z, 2x2y2z2
