Advertisements
Advertisements
प्रश्न
Use the direct method to evaluate the following products:
(a – 8) (a + 2)
Advertisements
उत्तर
Step 1: Multiply each term in the first bracket by each term in the second bracket
= a(a + 2) − 8(a + 2)
Step 2: Simplify each multiplication
= (a2 + 2a) − (8a + 16)
Step 3: Combine like terms
= a2 + 2a − 8a − 16
= a2 − 6a − 16
APPEARS IN
संबंधित प्रश्न
If \[x - \frac{1}{x} = - 1\] find the value of \[x^2 + \frac{1}{x^2}\]
If a + b = 10 and ab = 21, find the value of a3 + b3
If 3x − 2y = 11 and xy = 12, find the value of 27x3 − 8y3
If \[x^4 + \frac{1}{x^4} = 119\] , find the value of \[x^3 - \frac{1}{x^3}\]
If a + b = 8 and ab = 6, find the value of a3 + b3
Find the following product:
(2ab − 3b − 2c) (4a2 + 9b2 +4c2 + 6 ab − 6 bc + 4ca)
If a - b = 4 and a + b = 6; find
(i) a2 + b2
(ii) ab
Evaluate: (5xy − 7) (7xy + 9)
If `"a"^2 - 7"a" + 1` = 0 and a = ≠ 0, find :
`"a"^2 + (1)/"a"^2`
If `"r" - (1)/"r" = 4`; find : `"r"^4 + (1)/"r"^4`
