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A day full of math games & activities. Find one near you.
A day full of math games & activities. Find one near you.
Find and correct the errors in the statement: (3x + 2)2 = 3x2 + 6x + 4
Solution:
An equation is a mathematical statement with an 'equal to' symbol between two algebraic expressions that have equal values.
Given,
(3x + 2)2 = 3x2 + 6x + 4
Solving LHS we get,
(3x + 2)2
= (3x)2 + 2(3x)(2) + (2)2 [Using identity (a + b)2 = a2 + 2ab + b2]
= 9x2 + 12x + 4
But RHS is given as 3x2 + 6x + 4
Thus, L.H .S. ≠ R.H.S.
The correct statement is (3x + 2)2 = 9x2 + 12x + 4
☛ Check: NCERT Solutions for Class 8 Maths Chapter 14
Video Solution:
Find and correct the errors in the statement: (3x + 2)² = 3x² + 6x + 4
Class 8 Maths NCERT Solutions Chapter 14 Exercise 14.4 Question 9
Summary:
Find and correct the errors in the statement: (3x + 2)2 = 3x2 + 6x + 4. The correct statement is (3x + 2)2 = 9x2 + 12x + 4.
☛ Related Questions:
- Find and correct the errors in the following mathematical statement. Substituting x = -3 in (a) x2+ 5x + 4 gives (-3)2 + 5(-3) + 4 = 9 + 2 + 4 = 15 (b) x2 - 5x + 4 gives (-3)2 - 5(-3) + 4 = 9 - 15 + 4 = -2 (c) x2 + 5x gives (-3)2 + 5(-3) = -9 - 15 = -24
- Find and correct the errors in the statement: (y - 3)2 = y2 - 9
- Find and correct the errors in the statement: (z + 5)2 = z2 + 25
- Find and correct the errors in the statement: (2a + 3b)(a - b) = 2a2 - 3b2
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