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Mathematical Statements

Evaluate 3x...

Question

Evaluate $(3 x + 2)^{2}$

9 x^{2} + 12 x + 4

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x^{2} + 12 x + 4

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x^{2} + 2 x

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9 x + 12 x + 4

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Solution

The correct option is A $9 x^{2} + 12 x + 4$
$(3 x + 2)^{2}$
$= (3 x)^{2} + 2 (3 x) (2) + (2)^{2}$ ........ $[(a + b)^{2} = a^{2} + 2 a b + b^{2}]$
$= 9 x^{2} + 12 x + 4$

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Similar questions

Simplify each of the following and write as a single polynomial.

(i)

(ii)

(iii)

(iv)

(v)

f (x) = | x^{2} - 2 x - 3 | \cdot e^{| 9 x^{2} - 12 x + 4 |}

\frac{d y}{d x}

(i) 9 x^{2} - 12 x + 3

(i i) 9 x^{2} - 12 x + 4

Question 27
Factorise the following:

$(i) 9 x^{2} - 12 x + 3$

$(i i) 9 x^{2} - 12 x + 4$

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