Question
Easy
If 5x$^2$ - 8y - 20x + 2xy = (x + a) (bx + 2y), then the value of (a – b) is:
1
9
2
-1
3
-9
4
1
Question Details
Time to Solve: 12
Exam: CTET
Level/Paper: CTET_P2
Chapter: Algebra
Topic: Algebraic Expressions
Correct Answer
Option C
Explanation
To solve the problem and justify why Option 3 is the correct answer, we need to expand and compare the given expression with the factored form. The given expression is: \[ 5x^2 - 8y - 20x + 2xy \] We need to express this in the form: \[ (x + a)(bx + 2y) \] Expanding the right-hand side, we get: \[ (x + a)(bx + 2y) = x(bx + 2y)…Read More
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