So first you have to find the perfect square that matches up with x^2 + 6x
so half of 6, and square it. your perfect square is 9
x^2 + 6x + 9 = 7 + 9
then, condense the left side of the equation into a squared binomial:
(x + 3)^2 = 16
take the square root of both sides:
x + 3 = ± √16
therefore:
x + 3 = ± 4
x = - 3 ± 4
so your solution set is:
x = 1, -7
<h2><u>Angles</u> </h2>
<h3>Hintunglah nilai x</h3>
Seperti yang anda lihat dalam rajah, kedua-dua sudut membentuk pasangan linear. Untuk menyelesaikan x, samakan dua ukuran sudut yang diberikan kepada 180.
<u>Diberi:</u>
20 + 6x°
4x°
<u>Penyelesaian:</u>
- 20 + 6x + 4x = 180
- 20 + 10x = 180
- 10x = 180 - 20
- 10x = 160
- x = 160/10
- x = 16
Buktikan bahawa kedua-dua sudut adalah pasangan linear:
- 20 + 6x + 4x = 180; x = 16
- 20 + 6(16) + 4(16) = 180
- 20 + 96 + 64 = 180
- 116 + 64 = 180
- 180 = 180
<u>Jawab:</u>
- Oleh itu, nilai x ialah <u>16</u>.
Wxndy~~
Answer:
y = 22x+10
Step-by-step explanation:
Hopes this helps:
Answer: 123/100
1. 123% means 123 out of 100