Advertisements
Advertisements
प्रश्न
Expand (3m + 5)2
Advertisements
उत्तर
(3m + 5)2
Comparing (3m + 5)2 with (a + b)2 we have a = 3m and b = 5
(a + b)2 = a2 + 2ab + b2
(3m + 5)2 = (3m)2 + 2(3m)(5) + 52
= 32m2 + 30m + 25
= 9m2 + 30m + 25
APPEARS IN
संबंधित प्रश्न
Using identities, evaluate 1.05 × 9.5
Use an expansion formula to find the value.
(997)2
Use the formula to find the value.
502 × 498
Use a formula to multiply of (2a – 13)(2a + 13)
Expand: (51)2
If a + b = 10 and ab = 18, find the value of a2 + b2
Factorise the following, using the identity a2 + 2ab + b2 = (a + b)2.
x2 + 6x + 9
If p + q = 12 and pq = 22, then find p2 + q2.
Verify the following:
(7p – 13q)2 + 364pq = (7p + 13q)2
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: x2 + 4x + 4. Factorise 2x2 + 6x + 4 by using the figure.
Calculate the area of figure.
