CBSE Class 7 Answered
dear expert , this question was asked in the regular test conducted by topperlearning.com
Asked by B Shreya Goud | 15 Dec, 2014, 04:24: PM
Expert Answer
Dear shreyagoud@rediffmail.com
Thanks for asking us a question in Ask the Expert section of TopperLearning.com.
Actual question is:
For what value of a and b, the algebraic expression a3 + b3 - 3ab(a + b) equals 37.
Solution is:
Substituting the values of a and b from each of the given options, we get
(-2)3 + (3)3 - 3 
(-2)3(-2 + 3) = -8 + 27 + 18 = 37.
Hence, option (A).
| A | a = -2; b = 3 | (Correct) |
| B | a = 2; b = -3 | |
| C | a = -1; b = 1 | |
| D | a = 1; b = -2 |
But without the options it is not possible to find the solution.
Only after referring the options, we can solve the query.
Regards
Topperlearning Team.
Topperlearning Team.
Answered by Vimala Ramamurthy | 15 Dec, 2014, 05:05: PM
Concept Videos
-
Introduction to Algebraic Expressions
Definition of constant, variable, algebraic expression, monomial, binomial,... -
Addition and Subtraction of Algebraic Expressions
This topic covers addition and subtraction of polynomials and simplifying e...
CBSE 7 - Maths
Asked by mewaradaksh345 | 02 Jan, 2024, 07:38: PM
ANSWERED BY EXPERT
CBSE 7 - Maths
Asked by s7290989 | 20 Dec, 2023, 04:41: PM
ANSWERED BY EXPERTCBSE 7 - Maths
Asked by pranjalswaroopa5 | 07 Jul, 2023, 10:01: PM
ANSWERED BY EXPERTCBSE 7 - Maths
Asked by janbiverma1105 | 28 May, 2022, 07:53: AM
ANSWERED BY EXPERTCBSE 7 - Maths
Asked by vidhi72.8tks | 11 Feb, 2022, 05:24: PM
ANSWERED BY EXPERTCBSE 7 - Maths
Asked by vasumathir1978 | 14 Aug, 2021, 04:00: PM
ANSWERED BY EXPERT
