Answer:
4a+14
Step-by-step explanation:
2•(2a+7)
multiply parenthesis by 2
example: 2•2a 2•7
4a+14
Step-by-step explanation:
Correction:
1⟩
Given equation is x²-3x = 4
⇛ x²-3x -4 = 0
⇛ x²+x-4x-4 = 0
⇛ x(x+1)-4(x+1) = 0
⇛ (x+1)(x-4) = 0
⇛ x+1 = 0 or x-4 = 0
⇛ x = -1 or x = 4
2.⟩
Given equation is x²+4x+4 = 0
⇛ x²+2x+2x+4 = 0
⇛ x(x+2)+2(x+2) = 0
⇛ (x+2)(x+2) = 0
⇛ x+2 = 0
⇛ x = -2
Answer:
all R no.s greter than and equal to 0
Step-by-step explanation:
it is a function definde in mathamatics.the range is greter than or equal to 0.
Answer:
first number=2
second number=-5
Step-by-step explanation:
first number= a
second number= b
we have the following equations
7a+3b=-1 equation 1
a+b=-3 equation 2
using equation 2 we have
a=-3-b
using equation 1 we have
7(-3-b)+3b=-1
-21-7b+3b=-1
-4b=20
b=-20/4=-5 = second number
a+(-5)=-3
a-5=-3
a=-3+5
a=2= first number