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Marydivinelacsongo
Answered

solve the following quadratic equations by factoring:(SHOW YOUR SOLUTION)
1.ײ-4×=0
2.ײ+2×=15
3.ײ-8×+16=0
4.ײ-5×=2ײ-5×
5.20ײ-9×=20​

Sagot :

Sherwintanogo

Answer:

x²-4x=0

x(x-4)

x²+2x=15

x²+2x-15=0

(x+5)(x-3)

x²-8x+16=0

(x-4)(x-4)

x²-5x=2x²-5x

x²-2x²-5x+5x=0

-x²=0

-x(x)

20x²-9x=20

20x²-9x-20=0

(5x+4)(4x-5)

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