Advertisements
Advertisements
Question
Evaluate: 203 × 197
Advertisements
Solution
203 × 197
= (200 + 3) (200 − 3)
= (200)2 − (3)2 ......[ ∵ (a − b) (a + b) = a2 − b2]
= 40000 − 9
= 39991
APPEARS IN
RELATED QUESTIONS
Factorise the following:
8a3 – b3 – 12a2b + 6ab2
Simplify the following products:
`(m + n/7)^3 (m - n/7)`
If \[x^2 + \frac{1}{x^2} = 98\] ,find the value of \[x^3 + \frac{1}{x^3}\]
Evaluate of the following:
933 − 1073
If x = 3 and y = − 1, find the values of the following using in identify:
\[\left( \frac{x}{y} - \frac{y}{3} \right) \frac{x^2}{16} + \frac{xy}{12} + \frac{y^2}{9}\]
If \[3x + \frac{2}{x} = 7\] , then \[\left( 9 x^2 - \frac{4}{x^2} \right) =\]
Expand the following:
(2x - 5) (2x + 5) (2x- 3)
If `"r" - (1)/"r" = 4`; find : `"r"^4 + (1)/"r"^4`
Simplify:
(1 + x)(1 - x)(1 - x + x2)(1 + x + x2)
Factorise the following:
9x2 + 4y2 + 16z2 + 12xy – 16yz – 24xz
