Answer:
see explanation
Step-by-step explanation:
1
(x + 5)² = 4 ( take the square root of both sides )
x + 5 = ± = ± 2 ( subtract 5 from both sides )
x = - 5 ± 2, thus
x = - 5 - 2 = - 7
x = - 5 + 2 = - 3
--------------------------------------------
2
(x + 6)² = 7 ( take the square root of both sides )
x + 6 = ± ( subtract 6 from both sides )
x = - 6 ± , thus
x = - 6 -
x = - 6 +
------------------------------------------------
3
(x - 2)² = 18 ( take the square root of both sides )
x - 2 = ± = ± = ± 3 ( add 2 to both sides )
x = 2 ± 3, thus
x = 2 - 3
x = 2 + 3
Answer:
7
Step-by-step explanation:
1) Subsitute 16 for B
2) 16-9=7
Hope this helps and good luck on your assignment. (please mark me brainliest if possible)
Rewrite it in the form a^2 - b^2, where a = x and b = 5
x^2 - 5^2
Use the Difference of Squares: a^2 - b^2 = (a + b)(a - b)
<u>= (x + 5)(x - 5)</u>