Question

solve : a) -(×+2) = 2 (3×-6) b) 3 (×+7) -4=7×-1​

Answer 1

Step-by-step explanation:

Given A(2,−3)&B(10,y) and AB=10

Distance between two points

(x

2

−x

1

)

2

+(y

2

−y

1

)

2

∴10=

(10−2)

2

+(y+3)

2

Squaring both sides

⇒100=64+9+6y+y

2

⇒y

2

+6y−27=0

⇒y(y+9)−3(y+9)=0

⇒y=−9,3

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Answer 2

Step-by-step explanation:

a) -(X+2)=2(3x-6)

-x-2= 6x-12

-x-2-6x+12=0

-7x+10=0

-7x= -10

X= 10/7

b) (X+7)-4=7× -1

-4x-28= -7.

-4x = 28-7

-4x = 21

X= 21/-4