Download App

Fundamental Concepts (Including Fundamental Operations) — MATHS STD 7 — Question

ICSE BoardEnglish MediumSTD 7MATHSFundamental Concepts (Including Fundamental Operations)3 Marks
Question
Multiply:$ (2x + 5y + 6)(3x + y - 8)$
✓

Answer

$(2x + 5y + 6)(3x + y - 8)$
$\Rightarrow 2x (3x + y - 8) + 5y(3x + y - 8) + 6 (3x + y - 8)$
$\Rightarrow 6x^2 + 2xy - 16x + 15xy + 5y^2 - 40y + 18x + 6y - 48$
$\Rightarrow 6x^2 + 2xy + 15xy - 16x + 18x + 5y^2 - 40y + 6y - 48$
$\Rightarrow 6x^2 + 17xy + 2x + 5y^2 - 34y - 48$

Need a full question paper?

Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.

Start Generating Free

Explore more

More "[3 marks sum]" from Fundamental Concepts (Including Fundamental Operations)→Fundamental Concepts (Including Fundamental Operations) — all question types→MATHS STD 7 question papers→ICSE Board STD 7 question papers→ICSE Board question paper generator→

Similar questions

Subtract: $-\frac{3}{10}$ from $\frac{1}{5}$
→
The diameter of a circle is $42 \mathrm{~cm}$, find its perimeter. If the perimeter of the circle is doubled, what will be the radius of the new circle? (Take $\pi=\frac{22}{7}$ )
→
If x: y - 5 :4 and 2 : x = 3 :8, find the value of y.
→
Express the following rational numbers to the lowest terms: $\frac{-48}{-72}$
→
Two numbers are in the ratio 5: 7. Their difference is 10. Find the numbers.
→
If the mean of 8, 10, 7, x + 2 and 6 is 9, find the value of x.
→
Simplify and express the Solution in the positive exponent form:
$\frac{(-3)^3 \times 2^6}{6 \times 2^3}$
→
0.4x – 1.2 = 0.3x + 0.6
→
The angles of a triangle are in the ratio 3 :2 : 7. Find each angle.
→
Solve: $\frac{2 x}{3}+\frac{x}{2}-\frac{3 x}{4}=1$
→