Answer:
![(4x - 3)(5x - 8) = 20x^2 -47x + 24](https://tex.z-dn.net/?f=%284x%20-%203%29%285x%20-%208%29%20%3D%2020x%5E2%20-47x%20%2B%2024)
Step-by-step explanation:
Given
![(4x - 3)(5x - 8)](https://tex.z-dn.net/?f=%284x%20-%203%29%285x%20-%208%29)
Required
Identify and correct error
The error is when the inner and outer terms are multiplied. i.e.
not 32x
not 15x
So, the expression is:
![(4x - 3)(5x - 8) = 20x^2 - 32x -15x + 24](https://tex.z-dn.net/?f=%284x%20-%203%29%285x%20-%208%29%20%3D%2020x%5E2%20-%2032x%20-15x%20%2B%2024)
![(4x - 3)(5x - 8) = 20x^2 -47x + 24](https://tex.z-dn.net/?f=%284x%20-%203%29%285x%20-%208%29%20%3D%2020x%5E2%20-47x%20%2B%2024)
First one,
12q^2+34q-28
divide whole thing by 2
6q^2+17q-14
use trial and error and get (2x+7)(3x-2)
factored out form is (2)(2x+7)(3x-2)
2.
divide by 3
6h^2+5h-6
trial and error and get (2x+3)(3x-2)
so the factored form is (3)(2x+2)(3x-2)
3. divide by 2
6p^2-11x-10
use trial and error and get (2x-5)(3x+2)
the factored out form is (2)(2x-5)(3x+2)
4.divide by 4
2z^2+5z-12
use trial and error and get (x+4)(2x-3)
the factored form is (4)(x+4)(2x-3)
to factor the basic thing is
ax^2+bx+c
b=x+y
ac=xy
solve for x and y
so exg 2z^2+5z-12
a=2
b=5
c=-12
2 times -12=-24
then factctor -24 and find factors that add up to 5
-1, 24
-2, 12
-3, 8
-4,6
now add
-1+24=23
-2+12=10
-3+8=5 check
-4+6=2
the numbers are -3 and 8
split it into such
2z^2+8z-3z-12
group (2z^2+8z)+(-3z-12)
undistribute using distributive property
ab+ac=a(b+c)
(2z)(z+4)+(-3)(z+4)
now reverse distribute again
((2z)+(-3))(z+4)
(2z-3)(z+4)
Answer:
log x²![y^{4}](https://tex.z-dn.net/?f=y%5E%7B4%7D)
Step-by-step explanation:
Using the rules of logarithms
log x + log y ⇔ log xy
log
⇔ n log x
Given
2logx + 4logy
= logx² + log![y^{4}](https://tex.z-dn.net/?f=y%5E%7B4%7D)
= log x²![y^{4}](https://tex.z-dn.net/?f=y%5E%7B4%7D)