Answer:
−2x4−18x3y
Step-by-step explanation:
Let's simplify step-by-step.
(−3x2)(xy+2x2)+7x4−3x3(5y+x)
Distribute:
=(−3x2)(xy)+(−3x2)(2x2)+7x4+−3x4+−15x3y
=−3x3y+−6x4+7x4+−3x4+−15x3y
Combine Like Terms:
=(−6x4+7x4+−3x4)+(−3x3y+−15x3y)
=−2x4+−18x3y
cos(20°) = (14/2)/x
x = 7/cos(20°) ≈ 7.45
140
140-15=125
125÷5=25
answer=25
-1
-21+-1 equals -22
so u can't say +1 cos that will reduce the figures
