Q: How do you factorise 3t plus 9?

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-5t + 9 + 2t = 30Combine like terms on the left side:-3t + 9 = 30Multiply both sides by -1"3t - 9 = -30Add 9 to both sides:3t = -21Divide both sides by 3:t = -7

-12t+4

3t+11 = 29 3t = 29-11 3t = 18 t = 6

Gather like terms: 3t - t = 13 - 4 ie 2t = 9 so t =4½ Check: 3t = 13½ + 4 = 17½, 4½ +13 = 17½ QED

if you mean T-3t+2t+4 (T and t is different variables):T-3t+2t+4=T-t+4if you mean t-3t+2t+4:t-3t+2t+4=4

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15t+25 = 5(3t+5)

-5t + 9 + 2t = 30Combine like terms on the left side:-3t + 9 = 30Multiply both sides by -1"3t - 9 = -30Add 9 to both sides:3t = -21Divide both sides by 3:t = -7

-12t+4

3t - 15 = -9 3t - 15 (+15) = -9 (+15) 3t = 6 3t (/3) = 6 (/3) t = 2

Plus 3T

9t2

4(t + 3)(t2 - 3t + 9)

3t+11 = 29 3t = 29-11 3t = 18 t = 6

3t + 9 = 3(t + 3)

12 = - 3t + 9subtract 9 from each side12 - 9 = -3t + 9 - 93 = - 3tdivide both sides integers by - 33/- 3 = (- 3/ - 3)t- 1 = t=======check in original equation12 = - 3(- 1) + 912 = 3 + 912 = 12=======checks

Gather like terms: 3t - t = 13 - 4 ie 2t = 9 so t =4½ Check: 3t = 13½ + 4 = 17½, 4½ +13 = 17½ QED

2x2 - 9x + 4 = (2x - 1)(x - 4)