What is 1213-9x2 - 4x + 3 in factored form?

Do you mind if you guys me with this question i’m on number 8

Divide. –4.2 ÷ 6 = a –0.7 b 0.7 c –7 d 7 me

Solve these problems: 1.what is the perimeter of an equilateral triangle with sides measuring 6cm? 2. a regular pentagon has sides measuring 3.2 cm. what is its perimeter? 3. a regular decagon has sides of 3.5mm . what is it’s perimeter? 4. a regular octagon has a perimeter of 64cm. what is the length of one of the sides? 5. a regular hexagon has a perimeter of 72mm . what is the length of one of the sides? 6. what is the perimeter of a rhombus with sides measuring 11m?