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प्रश्न
Using identities, evaluate 712
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उत्तर
712 = (70 + 1)2
= (70)2 + 2(70) (1) + (1)2 [(a + b)2 = a2 + 2ab + b2 ]
= 4900 + 140 + 1 = 5041
संबंधित प्रश्न
Using identities, evaluate (5.2)2
Expand:
`("y" - 3/"y")^2`
Simplify: (a + b)2 – 4ab
(a + b)2 = a2 + b2
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x2 + 2x + 1
Factorise the following.
p2 + 14p + 13
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18 + 11x + x2
If p + q = 12 and pq = 22, then find p2 + q2.
Factorise p4 + q4 + p2q2.
Take suitable number of cards given in the adjoining diagram [G(x × x) representing x2, R(x × 1) representing x and Y(1 × 1) representing 1] to factorise the following expressions, by arranging the cards in the form of rectangles:
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- x2 + 4x + 4.
Factorise 2x2 + 6x + 4 by using the figure.
Calculate the area of figure.
