Question

Pls answer this 2 question's fully

Answer 1

Answer:

$3) \displaystyle \: \frac{2x}{5} - 3 = 17$

Multiplying both sides by 5,

$2x - 15 = 85$

$2x = 85 + 12$

$2x = 100$

$\displaystyle \green{x = \frac{100}{2} }$

$\green{x = 50}$

$4)$

${a}^{2} - 2 \times a \times 3 + 9$

Using identity of a²-2ab+b²

${a}^{2} - 2 \times a \times 3 + {3}^{2}$

Using identity a²-2ab+b² = (a - b)² to factor out expression.

$\green{=(a - 3) {}^{2}}$

Answer 2

Answer:

5

2x

−3=17

Multiplying both sides by 5,

2x - 15 = 852x−15=85

2x = 85 + 122x=85+12

2x = 1002x=100

\displaystyle \green{x = \frac{100}{2} }x=

2

100

\green{x = 50}x=50

4)4)

{a}^{2} - 2 \times a \times 3 + 9a

2

−2×a×3+9

Using identity of a²-2ab+b²

{a}^{2} - 2 \times a \times 3 + {3}^{2}a

2

−2×a×3+3

2

Using identity a²-2ab+b² = (a - b)² to factor out expression.

(a - 3) {}^{2}(a−3)

2