Answer:
a multiple b
Step-by-step explanation:
a x b = ab
eg. a = 5 , b = 2
ab = 5x2
1. (4x+5y)(2x-3y)+3xy= 4x*2x-4x*3y+5y*2x-5y*3y+3xy=8x^2-12xy+10xy-15y^2+3xy= 8x^2+xy-15y^2
2. (2x^2+3)(4x+5)-8x(x^2-2)=2x^2*4x+2x^2*5+3*4x+3*5-8x*x^2+8x*2=
=8x^3+10x^2+12x+15-8x^3+16x=
=10x^2+28x+15
Answer:
x < -19
Step-by-step explanation:
2x+10<-28
Subtract 10 from each side
2x+10-10<-28-10
2x< -38
Divide each side by 2
2x/2 <-38/2
x < -19
Answer: x=(c-k) over 3
Step-by-step explanation:Here we are given the equation 3x+k =c
Here in order to solve for x , first let us bring k to the right side.
k is in addition on the left , so when we bring it to the right it gets subtracted
now we have to isolate x on the left side , 3 is in multiplication with x , so when we bring it to the right side we divide by 3
Answer=x=(c-k) over 3
