Ex 14.4

Chapter 14 Class 8 Factorisation
Serial order wise

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### Transcript

Ex 14.4, 10 Find and correct the errors in the following mathematical statements. Substituting x = β 3 in (a) π₯^2 + 5x + 4 gives γ"(β 3)" γ^2+ 5 (β 3) + 4 = 9 + 2 + 4 = 15 π₯^2 + 5x + 4 Putting x = β3 = γ(β3)γ^2 + 5 (β3) + 4 = (β3 Γ β3) β (5 Γ 3) + 4 = 9 β 15 + 4 = β 2 So, (β3)2 + 5(β3) + 4 = β2 is the correct statement Ex 14.4, 10 Find and correct the errors in the following mathematical statements. Substituting x = β 3 in (b) π₯^2 β 5x + 4 gives γ"(β 3)" γ^2β 5 ( β 3) + 4 = 9 β 15 + 4 = β 2 π₯^2 + 5x + 4 Putting x = β3 = γ(β3)γ^2 β 5 (β3) + 4 = (β3 Γ β3) + (5 Γ 3) + 4 = 9 + 15 + 4 = 28 So, (β3)2 β 5(β3) + 4 = 28 is the correct statement Ex 14.4, 10 Find and correct the errors in the following mathematical statements. Substituting x = β 3 in (c) π₯^2+ 5x gives γ"(β 3)" γ^2+ 5 (β3) = β 9 β 15 = β 24 π₯^2 + 5x Putting x = β3 = γ(β3)γ^2 + 5 (β3) = (β3 Γ β3) β (5 Γ 3) = 9 β 15 = β6 So, (β3)2 + 5(β3) = β6 is the correct statement