Advertisements
Advertisements
Question
Use the direct method to evaluate the following products:
(5a + 16) (3a – 7)
Sum
Advertisements
Solution
(5a + 16) (3a – 7)
= (5a × 3a) + (5a × −7) + (16 × 3a) + 16 × (−7)
= (15a2) + (−35a) + 48a + (−112)
= 15a2 − 35a + 48a − 112
= 15a2 + 13a − 112
shaalaa.com
Is there an error in this question or solution?
APPEARS IN
RELATED QUESTIONS
Use suitable identity to find the following product:
(x + 8) (x – 10)
Evaluate the following using suitable identity:
(99)3
Give possible expression for the length and breadth of the following rectangle, in which their area is given:
| Area : 35y2 + 13y – 12 |
If \[x + \frac{1}{x} = 5\], find the value of \[x^3 + \frac{1}{x^3}\]
Evaluate of the following:
463+343
Evaluate:
483 − 303 − 183
Evaluate: (5xy − 7) (7xy + 9)
Evaluate: (1.6x + 0.7y) (1.6x − 0.7y)
Find the squares of the following:
9m - 2n
Find the following product:
(x2 – 1)(x4 + x2 + 1)
