Math, asked by roohimastan20, 1 month ago

solve by QE by factorization method x square +10x+21=0

Answers

Answered by vansh8584

8

Answer:

x= -3, -7

Step-by-step explanation:

x²+10x+21=0

x²+(7x+3x)+21=0

x²+7x+3x+21=0

x(x+7)+3(x+7)=0

(x+3)(x+7)=0

x+3=0 x++7=0

x= -3 x= -7

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