Two mark example problems II — task. Mathematics State Board, Class 8.

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1. Expand

$y^2 - 16$ by using

$a^2 - b^2$ identity.

Answer:

$y^2 - 16 =$

$(i + i) (i - i)$

(Note: Enter the numbers variable followed by the number.)

2. Simplify

$(5x + 3)(5x + 4)$ by using

$(x + a)(x + b)$ identity.

Answer:

$(5x + 3)(5x + 4) =$

${i i}^{i} + i i + i$

3. Expand

$(x + 4)^3$ .

Answer:

$(x + 4)^3 =$

$i^{i} + {i i}^{i} + i i + i$

(Note: Enter the numbers first followed by the variables.)

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4. Two mark example problems II