a)2x^2+4x=30
b)2x^2-7x+5=0
b)2x^2-7x+5=0
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2x^2+4x=30
2x^2+4x-30=0
(2x+10)(x-3)=0
2x-10=0 x-3=0
2x=10 x=3
x=5
2x^2-7x+5=0
(2x-5)(x-1)=0
2x-5=0 x-1=0
2x=5 x=1
x=5/2
2x^2+4x-30=0
(2x+10)(x-3)=0
2x-10=0 x-3=0
2x=10 x=3
x=5
2x^2-7x+5=0
(2x-5)(x-1)=0
2x-5=0 x-1=0
2x=5 x=1
x=5/2
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b) 2x^2 - 7x + 5 = 0
2x^2 - 2x - 5x + 5 = 0
2x(x - 1) - 5(x - 1) = 0
(x - 1)(2x - 5) = 0
x = 1 or x = 5/2
check
One problem at a time...read your textbook...practice.
2x^2 - 2x - 5x + 5 = 0
2x(x - 1) - 5(x - 1) = 0
(x - 1)(2x - 5) = 0
x = 1 or x = 5/2
check
One problem at a time...read your textbook...practice.