Question

Trig: Solve Quadratic Equations by Factoring help with 3c and 3d

Answer 1

Answer:

3c) x = 1/4, x = 6

3d) t = 0, t = 4

Step-by-step explanation:

3c).....................................

• 6x² - 15x + 2 = 2x² + 10x - 4
• 4x² -25x + 6 = 0
• 4x² - 24x - (x - 6) = 0
• 4x(x -6) - (x - 6) = 0
• (4x - 1)(x - 6) =0
• 4x - 1 = 0 ⇒ 4x = 1 ⇒ x = 1/4
• x - 6 = 0 ⇒ x = 6

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3d).....................................

• - 16t² + 76t + 5 = 12t + 5
• -16t² + 64t = 0
• t² - 4t = 0
• t(t - 4) = 0
• t = 0
• t - 4 = 0 ⇒ t = 4