Solve the following equations, giving your answers correct to 3 significant figures: a. k 2 + 11k

Question:

Solve the following equations, giving your answers correct to 3 significant figures:

a. k2 + 11k − 1 = 0 

b. 2t2 − 5t + 1 = 0 

c. 10 − x − x2 = 7 

d. (3x − 1)2 = 3 − x2

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