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Algebraic Identities

Question 9Fin...

Question

Question 9
Find and correct the errors in the statement: $(3 x + 2)^{2} = 3 x^{2} + 6 x + 4$

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Solution

$L . H . S = (3 x + 2)^{2} = (3 x)^{2} + 2 (3 x) (2) + (2)^{2} [(a + b)^{2} = a^{2} + 2 a b + b^{2}] = 9 x^{2} + 12 x + 4 \neq R . H . S T h e c o r r e c t s t a t e m e n t i s (3 x + 2)^{2} = 9 x^{2} + 12 x + 4$

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Q. Question 9
Find and correct the errors in the statement:

(3 x + 2)^{2} = 3 x^{2} + 6 x + 4

Find and correct the errors in the statement: (3x + 2)² = 3x² + 6x + 4

Q. Find and correct errors of the following mathematical expressions:ind and correct error

(3 x + 2)^{2} = 3 x^{2} + 6 x + 4

Find and correct the errors (if any) in the following expressions:

$i .) (5 x - 2)^{2} = 25 x^{2} + 4 - 20 x$

$i i .) (3 x + 2)^{2} = 3 x^{2} + 6 x + 4$

Find and correct the errors (if any) in the following expressions:

$i .) (5 x - 2)^{2} = 25 x^{2} + 4 - 20 x$

$i i .) (3 x + 2)^{2} = 3 x^{2} + 6 x + 4$ [2 MARKS]

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Algebraic Identities

Standard VIII Mathematics

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