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For what value of x, the matrix2x + 4x + 5is a singular matrix? |
| Answer» RIX is SINGULAR, its determinant has to be zero.⇒(3−X)[(4−x)(−1−x)+4]−2[2(−1−x)+2]+2[−8+2(4−x)]=0⇒(3−x)[−4−4x+x+x 2 +4]−2[−2−2x+2]+2[−8+8−2x]=0⇒(3−x)[x 2 −3x]+4x−4x=0⇒(3−x)x(x−3)=0⇒x=0,3_____________________________________Is it right. | |