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Algebraic Identities

Question 11Fi...

Question

Question 11
Find and correct the errors in the statement: $(y - 3)^{2} = y^{2} - 9$

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Solution

$L . H . S = (y - 3)^{2} = (y)^{2} - 2 (y) (3) + (3)^{2} [(a - b)^{2} = a^{2} - 2 a b + b^{2}] = y^{2} - 6 y + 9 \neq R . H . S T h e c o r r e c t s t a t e m e n t i s (y - 3)^{2} = y^{2} - 6 y + 9$

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Similar questions

Q. Question 11
Find and correct the errors in the statement:

(y - 3)^{2} = y^{2} - 9

Find and correct the errors in the statement: (y − 3)² = y² − 9

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

(y - 3)^{2} = y^{2} - 9

Question 10(iii)
Find and correct the errors in the following mathematical statement. Substituting $x = - 3$ in
$x^{2} + 5 x g i v e s (- 3)^{2} + 5 (- 3) = - 9 - 15 = - 24$

Q. Question 10(i)
Find and correct the errors in the following mathematical statement, Substituting

x = - 3

x^{2} + 5 x + 4 g i v e s (- 3)^{2} + 5 (- 3) + 4 = 9 + 2 + 4 = 15

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Algebraic Identities

Standard VIII Mathematics

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