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ICSE Class X Math 2017 Paper

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SECTION B (40 Marks)
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Question : 13 of 31
Marks: +1, -0
Given matrix B=[1183]B={\begin{bmatrix} 1 & 1 \\ 8 & 3 \end{bmatrix}}. Find the matrix XX if, X=B2−4BX=B^2-4 B. Hence solve for aa and bb given X[ab]=[550]X\left[\begin{array}{c} a \\ b \end{array}\right]=\left[\begin{array}{c} 5 \\ 50 \end{array}\right]
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