Question

*Maths homework*
Add
i) 4x+3y-6z, 3y +5x-3z , 6x+7y+8z.
ii) 2p+q,-4p+6q,5p-3q
Subtract
i) 7x+4y-9z from 3z+6y-4x​

Answer 1

Step-by-step explanation:

ADD-

i) (4x+3y-6z)+(3y+5x-3z)+(6x+7y+8z)

=4x+3y-6z+3y+5x-3z+6x+7y+8z

=(4x+5x+6x)+(3y+3y+7y)+(-6z-3z+8z)

=(15x)+(13y)+(-z)

=15x+13y-z

ii) (2p+q)+(-4p+6q)+(5p-3q)

= 2p+q-4p+6q+5p-3q

= (2p-4p+5p)+(q+6q-3q)

= (3p)+(4q)

= 3p+4q

SUBTRACT-

i) (3z+6y-4x)-(7x+4y-9z)

= 3z+6y-4x-7x-4y+9z

= (3z+9z)+(6y-4y)+(-4x-7x)

= (12z)+(2y)+(-11x)

= 12z+2y-11x