Advertisements
Advertisements
Question
Evaluate: (2a + 0.5) (7a − 0.3)
Advertisements
Solution
(2a + 0.5) (7a − 0.3)
= 2a (7a − 0.3) + 0.5 (7a − 0.3)
= 14a2 − 0.6a + 3.5a − 0.15
= 14a2 + 2.9a − 0.15
APPEARS IN
RELATED QUESTIONS
Simplify the following products:
`(2x^4 - 4x^2 + 1)(2x^4 - 4x^2 - 1)`
If \[x + \frac{1}{x} = 3\], calculate \[x^2 + \frac{1}{x^2}, x^3 + \frac{1}{x^3}\] and \[x^4 + \frac{1}{x^4}\]
Find the following product:
(2ab − 3b − 2c) (4a2 + 9b2 +4c2 + 6 ab − 6 bc + 4ca)
If \[x^3 - \frac{1}{x^3} = 14\],then \[x - \frac{1}{x} =\]
Use the direct method to evaluate the following products:
(5a + 16) (3a – 7)
If `"a" + 1/"a" = 6;`find `"a"^2 - 1/"a"^2`
If `x + (1)/x = 3`; find `x^2 + (1)/x^2`
If p2 + q2 + r2 = 82 and pq + qr + pr = 18; find p + q + r.
Without actually calculating the cubes, find the value of:
`(1/2)^3 + (1/3)^3 - (5/6)^3`
Without actually calculating the cubes, find the value of:
(0.2)3 – (0.3)3 + (0.1)3
