3 years ago

Solve the quadratic equation. 4x2 - 9 = 0

Mathematics

2 answers:

fenix001 [56]3 years ago

4 0

(2x +3)(2x-3)= 0

x= -3/2 x = 3/2

lorasvet [3.4K]3 years ago

4 0

Answer:

x=3/2 or x= -3/2

Step-by-step explanation:

4x2=9

x2=9/4

x=(9/4)^1/2

x=3/2

or x= -3/2

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Substation method x-2y=5 ,<br> 3x-5y=8

valina [46]

$x-2y=5 \\
3x-5y=8 \\ \\
\hbox{solve the first equation for x:} \\
x-2y=5 \ \ \ |+2y \\
x=2y+5 \\ \\
\hbox{substitute 2y+5 for x in the second equation:} \\
3(2y+5)-5y=8 \\
6y+15-5y=8 \\
y+15=8 \ \ \ |-15 \\
y=-7 \\ \\
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3 years ago

Please answer correctly !!!!!!! Will mark brainliest !!!!!!!!!!

MrMuchimi

Answer:

side of square is 2-x

Step-by-step explanation:

Area of the square is side * side or side ², so the expression for the side has to be square root of area

A = 4 -4x + x²

It should be recognized that 4 -4x + x²is a special product ( 2-x)² because this is a perfect square trinomial

side of square is 2-x

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