Which of these statements hold true?

i.) $4 (x - 5) = 4 x - 5$

ii.) $x (3 x + 2) = 3 x^{2} + 2$

iii.) $2 x^{2} + 4 (2 x) + 7 = 2 x^{2} + 8 x + 7$ [4 MARKS]

Open in App

Solution

Concept: 1 Mark
Application: 1 Mark each

If the statements are true, then LHS should be equal to RHS

i.) $L H S = 4 (x - 5) = (4 \times x) - (4 \times 5) = 4 x - 20 \neq 4 x - 5 \neq R H S$

ii.) $L H S = x (3 x + 2) = 3 x^{2} + 2 x \neq 3 x^{2} + 2 \neq R H S$

iii.) $L H S = 2 x^{2} + 4 (2 x) + 7 = 4 x^{2} + 8 x + 7 = 2 x^{2} + 8 x + 7 = R H S$

Suggest Corrections

Similar questions

Find and correct the errors in the statement: (2x)² + 4(2x) + 7 = 2x² + 8x + 7

(2 x)^{2} + 4 (2 x) + 7 = 2 x^{2} + 8 x + 7

(2 x)^{2} + 4 (2 x) + 7 = 2 x^{2} + 8 x + 7

{(2 x)}^{2} + 4 (2 x) + 7 = 3 x^{2} + 8 x + 7 5 y + 2 y + y - 7 y = 0

y = x^{3} + 2 x^{2} + 7 x + 8

\frac{d y}{d x}

Join BYJU'S Learning Program