Original length: x
original width; x-3
original area: x(x-3)
when the dimensions doubles, that is, increase by a factor of 2, the area increase by 2²
4[x(x-3)]
4x(x-3)=4x²-12x
you can also do it this way:
original length: x doubled: 2x
original width; x-3 doubled: 2(x-3)
new area: 2x[2(x-3)]= 4x²-12x
Answer:
Step-by-step explanation:
c
Answer:
-4(5)+1(-2*-5+5*3)
Step-by-step explanation:
-20+1(10+15)
-19(25)
-475
Answer: x = +4 or -4
Step-by-step explanation:
x² - 1 = 15
x² = 15 + 1
x² = 16
Therefore, to solve for x we take the square root of both side
√x² = +/-√16
x² = +/-4
so, x = +4 or -4
