Question

4. if ( z - 4 ) ( z - 7 ) = 0 then find the value if z = -1 using the standard form of quadratic equations .

Answer 1

Answer:

$(z - 4)(z - 7) \\ = {z}^{2} - 11z + 28 \\ = { (- 1)}^{2} - 11 \times( - 1) + 28 \\ = 1 + 11 + 28 \\ = 40 \\ anssssssssssssssss$

Step-by-step explanation:

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