Question

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Answer 1

10)

$(5x - 3) {}^{2}$

$(5x - 3)(5x - 3)$

$25 {x}^{2} - 15x - 15x + 9$

$25x {}^{2} - 30x + 9$

11)

$(0.5a {}^{2} - 1.2 {b}^{3} ) {}^{2}$

$(0.5 {a}^{2} - 1.2 {b}^{3} )(0.5 {a}^{2} - 1.2 {b}^{3} )$

$0.25 {a}^{4} - 0.6 {a}^{2} {b}^{3 } - 0.6 {a}^{2} {b}^{3} + 1.44 {b}^{6}$

$0.25 {a}^{4} - 1.2 {a}^{2} {b}^{3} + 1.44 {b}^{6}$

12)

$( \frac{2}{3} {m}^{4} - 1) {}^{2}$

$( \frac{2}{3} {m}^{4} - 1)( \frac{2}{3} {m}^{4} - 1)$

$\frac{4}{9} {m}^{8} - \frac{2}{3} {m}^{4 } - \frac{2}{3} {m}^{4} + 1$

$\frac{4}{9} {m}^{8} - \frac{4}{3} {m}^{4} + 1$

13)

$(3 \sqrt{2x} - 3) {}^{2}$

$(3 \sqrt{2x} - 3)(3 \sqrt{2x} - 3)$

$18x - 9 \sqrt{2x} - 9 \sqrt{2x} + 9$

$18x - 18 \sqrt{2x} + 9$