Jawab:
[a.]  x = {-½, -3}
[b.]  x = {-2, -½}
[c.]  x = ⁴/₃

Penjelasan:
[a.]  2x² + 7x + 3 = 0
x² + 7x + 3(2) = 0
x² + 7x + 6 = 0
pq = 6, p + q = 7
p = 1, q = 6
½(2x+p)(2x+q) = 0
½(2x+1)(2x+6) = 0
(2x+1)(²/₂x + ⁶/₂) = 0
(2x+1)(x+3) = 0
x = {-½, -3}

[b.]  2x² + 5x + 2 = 0
x² + 5x + 2(2) = 0
x² + 5x + 4 = 0
pq = 4, p+q = 5
p = 4, q = 1
½(2x+p)(2x+q) = 0
½(2x+4)(2x+1) = 0
(²/₂x+⁴/₂)(2x+1) = 0
(x+2)(2x+1) = 0
x = {-2, -½}

[c.]  9x²-24x+16 = 0
x² - 24x + 16(9) = 0
x² - 24x + 144 = 0
pq = 144, p+q = -24
p = -12, q = -12
(9x+p)(9x+q) = 0
(9x-12)(9x-12) = 0
(9x-12)² = 0 (akar kembar)
(9x-12) = 0
9x = 12
x = ¹²/₉
x = ⁴/₃

(xcvi)