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2.-2(xkuadrat-3x+4) caranya dikerjain yg didalem kurung dulu
=-2(x+1)(x-4)= -2x-2-2x+8 = -4+6
3. (3x-2)(x+5) caranya 3x.x, 3x.5, -2.x, -2.5
=3xkuadrat+15x-2x-10= 3xkuadrat+13x-10
4. (2x+3)(3xkuadrat-x+7) caranya kerjain dulu yang 3xkuadrat
=(2x+3)(3x+2)(x+5)= 6xkuadrat+2xkuadrat+9x+6+3x+15 = 8xkuadrat+12x+21
maaf kalo jawabannya salah
2}. -2(x² - 3x + 4) = (-2 × x²) (-2 × (-3x)) (-2 × 4) = -2x² + 6x - 8
3}. (3x - 2) (x + 5) = (3x × x) (3x × 5) (-2 × x) (-2 × 5) = 3x² + (15x - 2x) - 10 = 3x² + 13x - 10
4}. (2x + 3) (3x² - x + 7) = (2x × 3x²) (2x × (-x)) (2x × 7) (3 × 3x²) (3 × (-x)) (3 × 7)
= 6x³ - 2x² + 14x + 9x² - 3x + 21
Itu Kalo Ga Salah yaa