Question

me ajuda por favor

a- 8×-[-2×+(10+3×-7)]

b- 2a²+{3a-[6a-(3a²+a)]}

Answer 1

a- 8×-[-2×+(10+3×-7)] =

8x -{-2x +10 +3x -7} =

8x +2x -10 -3x +7 =

8x +2x -3x = 10 -7

10x -3x = 3

7x = 3

x = 2/7

b- 2a²+{3a-[6a-(3a²+a)]} =

2a² +{3a -[6a -3a² -a]} =

2a² +{3a -6a +3a² +a]} =

2a² +3a -6a +3a² +a =

2a² +3a² -3a -6a +a =

5a² -9a +a =

5a² -8a =

a(5a -8)