Advertisements
Advertisements
प्रश्न
Use the direct method to evaluate the following products:
(5a + 16) (3a – 7)
Advertisements
उत्तर
(5a + 16) (3a – 7)
= (5a × 3a) + (5a × −7) + (16 × 3a) + 16 × (−7)
= (15a2) + (−35a) + 48a + (−112)
= 15a2 − 35a + 48a − 112
= 15a2 + 13a − 112
APPEARS IN
संबंधित प्रश्न
Evaluate the following product without multiplying directly:
103 × 107
Expand the following, using suitable identity:
(x + 2y + 4z)2
Factorise the following:
8a3 – b3 – 12a2b + 6ab2
Give possible expression for the length and breadth of the following rectangle, in which their area are given:
| Area : 25a2 – 35a + 12 |
If a + b + c = 9 and ab + bc + ca = 23, find the value of a2 + b2 + c2.
If a − b = 4 and ab = 21, find the value of a3 −b3
Find the following product:
(4x − 3y + 2z) (16x2 + 9y2 + 4z2 + 12xy + 6yz − 8zx)
If \[\frac{a}{b} + \frac{b}{a} = - 1\] then a3 − b3 =
Evaluate the following without multiplying:
(1005)2
If `"a" + 1/"a" = 6;`find `"a"^2 - 1/"a"^2`
