28-04-2015
Mathematics

Answered

1. if x =-3 calculate the value of 2x squared +x

2. solve 3x-3=x+5

3. solve 5x+4=3

Answer :

28-04-2015

2x² = -3² x 2 = 9 x 2 = 18
18 + -3 = 15 (as adding a negative means subtracting)
2x² + x = 15

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28-04-2015

2*-3 is -6. then squared it is +36 and finally +-3 would get you to +33.

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