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
Write the following cube in expanded form:
`[3/2x+1]^3`
Find the following product:
(4x − 3y + 2z) (16x2 + 9y2 + 4z2 + 12xy + 6yz − 8zx)
If x + \[\frac{1}{x}\] = then find the value of \[x^2 + \frac{1}{x^2}\].
If a + b + c = 9 and ab + bc + ca = 23, then a2 + b2 + c2 =
If a2 + b2 + c2 − ab − bc − ca =0, then
If a - b = 4 and a + b = 6; find
(i) a2 + b2
(ii) ab
Use the direct method to evaluate :
(3b−1) (3b+1)
Evaluate: (5xy − 7) (7xy + 9)
Evaluate, using (a + b)(a - b)= a2 - b2.
399 x 401
If `49x^2 - b = (7x + 1/2)(7x - 1/2)`, then the value of b is ______.
