Answer:
X = 9,X= -5, a = 2, b = -13
Step-by-step explanation:
For (1),
Using Cross-factorization,
it can be reduced to (X - 9)(X + 5) = 0
Equate each factor to 0:
we have X = 9 and X = -5
For (2),
It is the case of completing the Square,
add 4 so we get the completed square ( we want the form X^2 + 2a + a^2)
(X^2 + 4X + 4) - 9
can be simplified to (X+2)^2 -9
However since we added 4 it means we have to subtract 4
So it becomes (X+2)^2 -9 -4
= (X+2)^2 -13
Answer:
10h + 10 - 4 = 76;
10h + 6 = 76;
10h = 76 - 6;
10h = 70;
h = 70 ÷ 10;
h = 7;
Check: 10 · ( 7 + 1 ) - 4 =
10 · 8 - 4 =
80 - 4 =
76 TRUE
Step-by-step explanation:
Well it is a because i’m right thanks
The answer is -1
Byee.........?..
Answer:81.64
Step-by-step explanation:13x2=26 26x3.14=81.64